Some newer devices support NCQ autosense (cf ACS-4), so we should
be using it to retrieve the sense code and speed up recovery.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
If READ_LOG_DMA_EXT is supported we should try to use it for
reading the log pages.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
sata_sil24 for some reason pukes when tags are allocated round-robin
which helps tag ordered controllers. To work around the issue,
72dd299d50 ("libata: allow sata_sil24 to opt-out of tag ordered
submission") introduced ATA_FLAG_LOWTAG which tells libata tag
allocation to do lowest-first.
However, with the recent switch to blk-mq tag allocation, the liata
tag allocation code path is no longer used and the workaround is now
implemented in the block layer and selected by setting
scsi_host_template->tag_alloc_policy to BLK_TAG_ALLOC_FIFO. See
9269e23496 ("libata: make sata_sil24 use fifo tag allocator").
This leaves ATA_FLAG_LOWTAG withoout any actual user. Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Shaohua Li <shli@fb.com>
Cc: Dan Williams <dan.j.williams@intel.com>
This patch re-uses hsdev->dev which is allocated on heap. Therefore, the
private structure, which is global variable, is reduced by one field.
In one case ap->dev is used and there it seems to be right decision.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
The SATA implementation based on two actually different devices, i.e. SATA and
DMA controllers.
For Synopsys DesignWare DMA we have already a generic implementation of the
driver. Thus, the patch converts the code to use DMAEngine framework and
dw_dmac driver.
In future it will be better to split the devices inside DTS as well like it's
done on other platforms.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
It it better to have full message on one line. It simplifies to search for line
in the code by message when debugging.
Note that the lines which will be removed by sequential patch are not fixed
here.
There is no functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
ppc has special instruction forms to efficiently load and store values
in non-native endianness. These can be accessed via the arch-specific
{ld,st}_le{16,32}() inlines in arch/powerpc/include/asm/swab.h.
However, gcc is perfectly capable of generating the byte-reversing
load/store instructions when using the normal, generic cpu_to_le*() and
le*_to_cpu() functions eaning the arch-specific functions don't have much
point.
Worse the "le" in the names of the arch specific functions is now
misleading, because they always generate byte-reversing forms, but some
ppc machines can now run a little-endian kernel.
To start getting rid of the arch-specific forms, this patch removes them
from all the old Power Macintosh drivers, replacing them with the
generic byteswappers.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This adds ACPI support for the APM X-Gene SATA ports. When the system
boots using ACPI table, the SATA ports are able to configure using the
values supplied by the ACPI table rather than the DTS.
Signed-off-by: Feng Kan <fkan@apm.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Commit 9013d64e66 ("ata: sata_mv: fix disk hotplug for Armada
370/XP SoCs") added some manipulation of the LP_PHY_CTL register, but
using magic values. This commit changes the code to use proper
definitions for the LP_PHY_CTL register, which allows to document what
the different bits are doing.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Simon Guinot <simon.guinot@sequanux.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
SAS controller has its own tag allocation, which doesn't directly match to ATA
tag, so SAS and SATA have different code path for ata tags. Originally we use
port->scsi_host (98bd4be1) to destinguish SAS controller, but libsas set
->scsi_host too, so we can't use it for the destinguish, we add a new flag for
this purpose.
Without this patch, the following oops can happen because scsi-mq uses
a host-wide tag map shared among all devices with some integer tag
values >= ATA_MAX_QUEUE. These unexpectedly high tag values cause
__ata_qc_from_tag() to return NULL, which is then dereferenced in
ata_qc_new_init().
BUG: unable to handle kernel NULL pointer dereference at 0000000000000058
IP: [<ffffffff804fd46e>] ata_qc_new_init+0x3e/0x120
PGD 32adf0067 PUD 32adf1067 PMD 0
Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
Modules linked in: iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi igb
i2c_algo_bit ptp pps_core pm80xx libsas scsi_transport_sas sg coretemp
eeprom w83795 i2c_i801
CPU: 4 PID: 1450 Comm: cydiskbench Not tainted 4.0.0-rc3 #1
Hardware name: Supermicro X8DTH-i/6/iF/6F/X8DTH, BIOS 2.1b 05/04/12
task: ffff8800ba86d500 ti: ffff88032a064000 task.ti: ffff88032a064000
RIP: 0010:[<ffffffff804fd46e>] [<ffffffff804fd46e>] ata_qc_new_init+0x3e/0x120
RSP: 0018:ffff88032a067858 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8800ba0d2230 RCX: 000000000000002a
RDX: ffffffff80505ae0 RSI: 0000000000000020 RDI: ffff8800ba0d2230
RBP: ffff88032a067868 R08: 0000000000000201 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800ba0d0000
R13: ffff8800ba0d2230 R14: ffffffff80505ae0 R15: ffff8800ba0d0000
FS: 0000000041223950(0063) GS:ffff88033e480000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000058 CR3: 000000032a0a3000 CR4: 00000000000006e0
Stack:
ffff880329eee758 ffff880329eee758 ffff88032a0678a8 ffffffff80502dad
ffff8800ba167978 ffff880329eee758 ffff88032bf9c520 ffff8800ba167978
ffff88032bf9c520 ffff88032bf9a290 ffff88032a0678b8 ffffffff80506909
Call Trace:
[<ffffffff80502dad>] ata_scsi_translate+0x3d/0x1b0
[<ffffffff80506909>] ata_sas_queuecmd+0x149/0x2a0
[<ffffffffa0046650>] sas_queuecommand+0xa0/0x1f0 [libsas]
[<ffffffff804ea544>] scsi_dispatch_cmd+0xd4/0x1a0
[<ffffffff804eb50f>] scsi_queue_rq+0x66f/0x7f0
[<ffffffff803e5098>] __blk_mq_run_hw_queue+0x208/0x3f0
[<ffffffff803e54b8>] blk_mq_run_hw_queue+0x88/0xc0
[<ffffffff803e5c74>] blk_mq_insert_request+0xc4/0x130
[<ffffffff803e0b63>] blk_execute_rq_nowait+0x73/0x160
[<ffffffffa0023fca>] sg_common_write+0x3da/0x720 [sg]
[<ffffffffa0025100>] sg_new_write+0x250/0x360 [sg]
[<ffffffffa0025feb>] sg_write+0x13b/0x450 [sg]
[<ffffffff8032ec91>] vfs_write+0xd1/0x1b0
[<ffffffff8032ee54>] SyS_write+0x54/0xc0
[<ffffffff80689932>] system_call_fastpath+0x12/0x17
tj: updated description.
Fixes: 12cb5ce101 ("libata: use blk taging")
Reported-and-tested-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Removing some boilerplate by using module_pnp_driver instead of calling
register and unregister in the otherwise empty init/exit functions
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The OF functionality has moved to a common place and be used by many
archs. So we don't need to include the ppc arch specific header files
and depend on PPC_OF option any more. This is a preparation for
killing PPC_OF.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The driver was ignoring limits requested by libata.force. The output
would look like:
fsl-sata ffe18000.sata: Sata FSL Platform/CSB Driver init
ata1: FORCE: PHY spd limit set to 1.5Gbps
ata1: SATA max UDMA/133 irq 74
ata1: Signature Update detected @ 0 msecs
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 310)
Signed-off-by: Martin Hicks <mort@bork.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Pull block driver changes from Jens Axboe:
"This contains:
- The 4k/partition fixes for brd from Boaz/Matthew.
- A few xen front/back block fixes from David Vrabel and Roger Pau
Monne.
- Floppy changes from Takashi, cleaning the device file creation.
- Switching libata to use the new blk-mq tagging policy, removing
code (and a suboptimal implementation) from libata. This will
throw you a merge conflict, since a bug in the original libata
tagging code was fixed since this code was branched. Trivial.
From Shaohua.
- Conversion of loop to blk-mq, from Ming Lei.
- Cleanup of the io_schedule() handling in bsg from Peter Zijlstra.
He claims it improves on unreadable code, which will cost him a
beer.
- Maintainer update or NDB, now handled by Markus Pargmann.
- NVMe:
- Optimization from me that avoids a kmalloc/kfree per IO for
smaller (<= 8KB) IO. This cuts about 1% of high IOPS CPU
overhead.
- Removal of (now) dead RCU code, a relic from before NVMe was
converted to blk-mq"
* 'for-3.20/drivers' of git://git.kernel.dk/linux-block:
xen-blkback: default to X86_32 ABI on x86
xen-blkfront: fix accounting of reqs when migrating
xen-blkback,xen-blkfront: add myself as maintainer
block: Simplify bsg complete all
floppy: Avoid manual call of device_create_file()
NVMe: avoid kmalloc/kfree for smaller IO
MAINTAINERS: Update NBD maintainer
libata: make sata_sil24 use fifo tag allocator
libata: move sas ata tag allocation to libata-scsi.c
libata: use blk taging
NVMe: within nvme_free_queues(), delete RCU sychro/deferred free
null_blk: suppress invalid partition info
brd: Request from fdisk 4k alignment
brd: Fix all partitions BUGs
axonram: Fix bug in direct_access
loop: add blk-mq.h include
block: loop: don't handle REQ_FUA explicitly
block: loop: introduce lo_discard() and lo_req_flush()
block: loop: say goodby to bio
block: loop: improve performance via blk-mq
This is the usual grab bag of driver updates (hpsa, storvsc, mp2sas,
megaraid_sas, ses) plus an assortment of minor updates. There's also an
update to ufs which adds new phy drivers and finally a new logging
infrastructure for SCSI.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull first round of SCSI updates from James Bottomley:
"This is the usual grab bag of driver updates (hpsa, storvsc, mp2sas,
megaraid_sas, ses) plus an assortment of minor updates.
There's also an update to ufs which adds new phy drivers and finally a
new logging infrastructure for SCSI"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (114 commits)
scsi_logging: return void for dev_printk() functions
scsi: print single-character strings with seq_putc
scsi: merge consecutive seq_puts calls
scsi: replace seq_printf with seq_puts
aha152x: replace seq_printf with seq_puts
advansys: replace seq_printf with seq_puts
scsi: remove SPRINTF macro
sg: remove an unused variable
hpsa: Use local workqueues instead of system workqueues
hpsa: add in P840ar controller model name
hpsa: add in gen9 controller model names
hpsa: detect and report failures changing controller transport modes
hpsa: shorten the wait for the CISS doorbell mode change ack
hpsa: refactor duplicated scan completion code into a new routine
hpsa: move SG descriptor set-up out of hpsa_scatter_gather()
hpsa: do not use function pointers in fast path command submission
hpsa: print CDBs instead of kernel virtual addresses for uncommon errors
hpsa: do not use a void pointer for scsi_cmd field of struct CommandList
hpsa: return failed from device reset/abort handlers
hpsa: check for ctlr lockup after command allocation in main io path
...
Commit 84683a7e08 ("sata_dwc_460ex: enable COMPILE_TEST for the
driver") enabled this driver for non-ppc460-ex platforms, but it was
then disabled for ARM and ARM64 by commit 2de5a9c004 ("sata_dwc_460ex:
disable compilation on ARM and ARM64") because it's too noisy and
broken.
This disabled is entirely, because it's too noisy on x86-64 too, and
there's no point in disabling architectures one by one. At a minimum,
the code isn't 64-bit clean, and even on 32-bit it is questionable
whether it makes sense.
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
09c32aaa36 ("ahci_xgene: Fix the dma state machine lockup for the
ATA_CMD_SMART PIO mode command.") missed 3.19 release. Fold it into
for-3.20.
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch addresses the issue with ATA_CMD_SMART pio mode command for
enumeration and device detection with ATA devices. The X-Gene AHCI
controller has an errata in which it cannot clear the BSY bit after
the PIO setup FIS. The dma state machine enters CMFatalErrorUpdate
state and locks up. It is the same issue as in the commit 2a0bdff6b9
("ahci-xgene: fix the dma state machine lockup for the IDENTIFY DEVICE
PIO mode command").
For example : without this patch it results in READ DMA command failure
as shown below :
[ 126.700072] ata2.00: exception Emask 0x0 SAct 0x0
SErr 0x0 action 0x6 frozen
[ 126.707089] ata2.00: failed command: READ DMA
[ 126.711426] ata2.00: cmd c8/00:08:00:55:57/00:00:00:00:00/e1 tag 1
dma 4096 in
[ 126.711426] res 40/00:ff:00:00:00/00:00:00:00:00/40 Emask
0x4 (timeout)
[ 126.725956] ata2.00: status: { DRDY }
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Reported-by: Mark Langsdorf <mlangsdo@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
of_platform_device_create does not exist if OF_ADDRESS is not configured,
so limit its use accordingly.
Without this fix, the sparc64:allmodconfig build fails with
ERROR: "of_platform_device_create" [drivers/ata/libahci_platform.ko] undefined!
Fixes: c7d7ddee7e ("ata: libahci: Allow using multiple regulators")
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
The phy_power_off() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
The pci_dev_put() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
The owner module reference of the pata_of_platform's scsi_host is
initialized to pata_platform's one, because pata_of_platform driver
use a scsi_host_template defined in pata_platform. So this drivers
can be unloaded even if the scsi device is being accessed.
This fixes it by propagating the scsi_host_template to pata_of_platform
driver. The scsi_host_template is passed through a new
argument of __pata_platform_probe().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
The owner module reference of the ahci platform's scsi_host is
initialized to libahci_platform's one, because these drivers use a
scsi_host_template defined in libahci_platform. So these drivers can
be unloaded even if the scsi device is being accessed.
This fixes it by pushing the scsi_host_template from libahci_platform
to all leaf drivers. The scsi_host_template is passed through a new
argument of ahci_platform_init_host().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Function pdc_detect_pll_input_clock uses 'struct timeval'
to measure start and end times, used to compute the pll_clock value.
'struct timeval' on 32-bit systems will have its tv_sec field
overflow in year 2038 and beyond. This patch uses 'ktime_t'
(which uses 64 bits for seconds) for start and end times instead.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
libata starts using block tag now, we can use BLK_TAG_ALLOC_FIFO to
solve the sata_sil24 tag bug.
https://bugzilla.kernel.org/show_bug.cgi?id=87101
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Basically move the sas ata tag allocation to libata-scsi.c to make it clear
these staffs are just for sas.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
libata uses its own tag management which is duplication and the
implementation is poor. And if we switch to blk-mq, tag is build-in.
It's time to switch to generic taging.
The SAS driver has its own tag management, and looks we can't directly
map the host controler tag to SATA tag. So I just bypassed the SAS case.
I changed the code/variable name for the tag management of libata to
make it self contained. Only sas will use it. Later if libsas implements
its tag management, the tag management code in libata can be deleted
easily.
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Commit c7d7ddee7e ("ata: libahci: Allow using multiple regulators")
releases regulators during ahci_platform_put_resources(). That doesn't
work because the function is run as part of the devres machinery. Such
resources are torn down in reverse order. Since the array that holds
pointers to the regulators is allocated using devres after the device
context to which ahci_platform_put_resources() is attached, the memory
will be freed before calling ahci_platform_put_resources() and thereby
causing a use-after-free error.
This commit fixes this by using regular allocations for the array. The
memory can then be freed after the regulators have been released. This
conserves the advantages of using the managed API.
Reported-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
We should only try to evaluate the cdb if this is an ATAPI
device, for any other device the 'cdb' field and the cdb_len
has no meaning.
Fixes: cbba5b0ee4
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tejun Heo <tj@kernel.org>
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
It is possible for ata_sff_flush_pio_task() to set ap->hsm_task_state to
HSM_ST_IDLE in between the time __ata_sff_port_intr() checks for HSM_ST_IDLE
and before it calls ata_sff_hsm_move() causing ata_sff_hsm_move() to BUG().
This problem is hard to reproduce making this patch hard to verify, but this
fix will prevent the race.
I have not been able to reproduce the problem, but here is a crash dump from
a 2.6.32 kernel.
On examining the ata port's state, its hsm_task_state field has a value of HSM_ST_IDLE:
crash> struct ata_port.hsm_task_state ffff881c1121c000
hsm_task_state = 0
Normally, this should not be possible as ata_sff_hsm_move() was called from ata_sff_host_intr(),
which checks hsm_task_state and won't call ata_sff_hsm_move() if it has a HSM_ST_IDLE value.
PID: 11053 TASK: ffff8816e846cae0 CPU: 0 COMMAND: "sshd"
#0 [ffff88008ba03960] machine_kexec at ffffffff81038f3b
#1 [ffff88008ba039c0] crash_kexec at ffffffff810c5d92
#2 [ffff88008ba03a90] oops_end at ffffffff8152b510
#3 [ffff88008ba03ac0] die at ffffffff81010e0b
#4 [ffff88008ba03af0] do_trap at ffffffff8152ad74
#5 [ffff88008ba03b50] do_invalid_op at ffffffff8100cf95
#6 [ffff88008ba03bf0] invalid_op at ffffffff8100bf9b
[exception RIP: ata_sff_hsm_move+317]
RIP: ffffffff813a77ad RSP: ffff88008ba03ca0 RFLAGS: 00010097
RAX: 0000000000000000 RBX: ffff881c1121dc60 RCX: 0000000000000000
RDX: ffff881c1121dd10 RSI: ffff881c1121dc60 RDI: ffff881c1121c000
RBP: ffff88008ba03d00 R8: 0000000000000000 R9: 000000000000002e
R10: 000000000001003f R11: 000000000000009b R12: ffff881c1121c000
R13: 0000000000000000 R14: 0000000000000050 R15: ffff881c1121dd78
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffff88008ba03d08] ata_sff_host_intr at ffffffff813a7fbd
#8 [ffff88008ba03d38] ata_sff_interrupt at ffffffff813a821e
#9 [ffff88008ba03d78] handle_IRQ_event at ffffffff810e6ec0
--- <IRQ stack> ---
[exception RIP: pipe_poll+48]
RIP: ffffffff81192780 RSP: ffff880f26d459b8 RFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff880f26d459c8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff881a0539fa80
RBP: ffffffff8100bb8e R8: ffff8803b23324a0 R9: 0000000000000000
R10: ffff880f26d45dd0 R11: 0000000000000008 R12: ffffffff8109b646
R13: ffff880f26d45948 R14: 0000000000000246 R15: 0000000000000246
ORIG_RAX: ffffffffffffff10 CS: 0010 SS: 0018
RIP: 00007f26017435c3 RSP: 00007fffe020c420 RFLAGS: 00000206
RAX: 0000000000000017 RBX: ffffffff8100b072 RCX: 00007fffe020c45c
RDX: 00007f2604a3f120 RSI: 00007f2604a3f140 RDI: 000000000000000d
RBP: 0000000000000000 R8: 00007fffe020e570 R9: 0101010101010101
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe020e5f0
R13: 00007fffe020e5f4 R14: 00007f26045f373c R15: 00007fffe020e5e0
ORIG_RAX: 0000000000000017 CS: 0033 SS: 002b
Somewhere between the ata_sff_hsm_move() check and the ata_sff_host_intr() check, the value changed.
On examining the other cpus to see what else was running, another cpu was running the error handler
routines:
PID: 326 TASK: ffff881c11014aa0 CPU: 1 COMMAND: "scsi_eh_1"
#0 [ffff88008ba27e90] crash_nmi_callback at ffffffff8102fee6
#1 [ffff88008ba27ea0] notifier_call_chain at ffffffff8152d515
#2 [ffff88008ba27ee0] atomic_notifier_call_chain at ffffffff8152d57a
#3 [ffff88008ba27ef0] notify_die at ffffffff810a154e
#4 [ffff88008ba27f20] do_nmi at ffffffff8152b1db
#5 [ffff88008ba27f50] nmi at ffffffff8152aaa0
[exception RIP: _spin_lock_irqsave+47]
RIP: ffffffff8152a1ff RSP: ffff881c11a73aa0 RFLAGS: 00000006
RAX: 0000000000000001 RBX: ffff881c1121deb8 RCX: 0000000000000000
RDX: 0000000000000246 RSI: 0000000000000020 RDI: ffff881c122612d8
RBP: ffff881c11a73aa0 R8: ffff881c17083800 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff881c1121c000
R13: 000000000000001f R14: ffff881c1121dd50 R15: ffff881c1121dc60
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
--- <NMI exception stack> ---
#6 [ffff881c11a73aa0] _spin_lock_irqsave at ffffffff8152a1ff
#7 [ffff881c11a73aa8] ata_exec_internal_sg at ffffffff81396fb5
#8 [ffff881c11a73b58] ata_exec_internal at ffffffff81397109
#9 [ffff881c11a73bd8] atapi_eh_request_sense at ffffffff813a34eb
Before it tried to acquire a spinlock, ata_exec_internal_sg() called ata_sff_flush_pio_task().
This function will set ap->hsm_task_state to HSM_ST_IDLE, and has no locking around setting this
value. ata_sff_flush_pio_task() can then race with the interrupt handler and potentially set
HSM_ST_IDLE at a fatal moment, which will trigger a kernel BUG.
v2: Fixup comment in ata_sff_flush_pio_task()
tj: Further updated comment. Use ap->lock instead of shost lock and
use the [un]lock_irq variant instead of the irqsave/restore one.
Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
The current implementation of the libahci allows using multiple PHYs
but not multiple regulators. This patch adds the support of multiple
regulators. Until now it was mandatory to have a PHY under a subnode,
now a port subnode can contain either a regulator or a PHY (or both).
In order to be able to asociate a port with a regulator the port are
now a platform device in the device tree case.
There was only one driver which used directly the regulator field of
the ahci_host_priv structure. To preserve the bisectability the change
in the ahci_imx driver was done in the same patch.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
The phy_ functions handle the NULL pointer case, so there is no need
to skip them if there is a NULL pointer. Moreover, after the error
label there is already no check on the pointer. This patch removes the
unnecessary tests and brings some consistency.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Ronny reports: https://bugzilla.kernel.org/show_bug.cgi?id=87101
"Since commit 8a4aeec8d "libata/ahci: accommodate tag ordered
controllers" the access to the harddisk on the first SATA-port is
failing on its first access. The access to the harddisk on the
second port is working normal.
When reverting the above commit, access to both harddisks is working
fine again."
Maintain tag ordered submission as the default, but allow sata_sil24 to
continue with the old behavior.
Cc: <stable@vger.kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Reported-by: Ronny Hegewald <Ronny.Hegewald@online.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
In order to make it possible to restore from hibernation not only in Linux but
also in e.g. U-Boot, we have to extend sata_rcar_{suspend|resume}() to {freeze|
thaw}() PM methods and implement the restore() PM method.
Signed-off-by: Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
[Sergei: killed unused variable, changed the order of initializers, modified
copyrights, renamed, modified changelog.]
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Until the driver is corrected to stop using mach/at91isam9_smc.h, it won't
compile in a ARCH_MULTIPLATFORM configuration.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch removes a duplicate AHCI-mode SATA Device ID for the Intel Sunrise Point PCH.
Signed-off-by: James Ralston <james.d.ralston@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
For now disable the compilation of the driver on ARM and ARM64. In the future
we will fix the DMA handling in that driver and re-enable compilation back.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Remove the function ata_do_simple_cmd() that is not used anywhere.
This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Tejun Heo <tj@kernel.org>
According to the Serial ATA AHCI specification, Device Sleep is an
optional feature and as such no errors should be printed if it's
missing. Keep informing users, but use dev_info() instead of dev_err().
Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
libata already uses an internal buffer, so we should be using
__scsi_format_command() here.
Tested-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
As defined, the DRAT (Deterministic Read After Trim) and RZAT (Return
Zero After Trim) flags in the ATA Command Set are unreliable in the
sense that they only define what happens if the device successfully
executed the DSM TRIM command. TRIM is only advisory, however, and the
device is free to silently ignore all or parts of the request.
In practice this renders the DRAT and RZAT flags completely useless and
because the results are unpredictable we decided to disable discard in
MD for 3.18 to avoid the risk of data corruption.
Hardware vendors in the real world obviously need better guarantees than
what the standards bodies provide. Unfortuntely those guarantees are
encoded in product requirements documents rather than somewhere we can
key off of them programatically. So we are compelled to disabling
discard_zeroes_data for all devices unless we explicitly have data to
support whitelisting them.
This patch whitelists SSDs from a few of the main vendors. None of the
whitelists are based on written guarantees. They are purely based on
empirical evidence collected from internal and external users that have
tested or qualified these drives in RAID deployments.
The whitelist is only meant as a starting point and is by no means
comprehensive:
- All intel SSD models except for 510
- Micron M5?0/M600
- Samsung SSDs
- Seagate SSDs
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
The patch converts ->probe() to use devm_kzalloc that simplifies error path.
Note that ata_host_alloc_pinfo() has been using device resources already.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
There is no need to print a message about failure of memory allocation. The
caller will get an error code and may print the same.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch fixes the style of usage of a node pointer. There is no functional
change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
There are a lot sparse warnings. Most of them related to __iomem keyword which
sometimes absent when it's needed and vise versa.
The patch fixes most of the warnings.
While at it, remove the redundant sata_dwc_sht.can_queue
initialization to ATA_DEF_QUEUE.
tj: Added description about ATA_DEF_QUEUE init removal.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
To test how the driver could be compiled in the non-native environment let's
enable COMPILE_TEST for it. It would be useful for further work.
This patch enables COMPILE_TEST for the driver and fixes compilation errors on
at least x86 platforms.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Driver core sets it to NULL upon probe failure or release.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Pull to receive 4aaa71873d ("sata_dwc_460ex: fix resource leak on
error path") so that further cleanup patches can be queued on top.
Signed-off-by: Tejun Heo <tj@kernel.org>
DMA mapped IO should be unmapped on the error path in probe() and
unconditionally on remove().
Fixes: 62936009f3 ([libata] Add 460EX on-chip SATA driver, sata_dwc_460ex)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Remove the FIXME comment in atapi_eh_request_sense () asking whether
memset of sense buffer is necessary. The buffer may be partially or
fully filled by the device. We want it to be cleared.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Due to H/W errata, the controller is unable to save the PMP
field fetched from command header before sending the H2D FIS.
When the device returns the PMP port field in the D2H FIS, there is
a mismatch and results in command completion failure. The workaround
is to write the pmp value to PxFBS.DEV field before issuing any command
to PMP.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch implements the function xgene_ahci_poll_reg_val
to poll PxCI for multiple IDENTIFY DEVICE commands to finish before
restarting the DMA engine.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Pull to receive the following two ahci_xgene fixes for the planned
xgene PMP support patches.
5c0b8e0de7 ("ahci_xgene: Fix the endianess issue in APM X-Gene SoC AHCI SATA controller driver.")
1102407bb7 ("ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.")
Signed-off-by: Tejun Heo <tj@kernel.org>
The driver sata_dwc_460ex is using this symbol. To build it as a
module we have to have the symbol exported. This patch adds
EXPORT_SYMBOL_GPL() macro for that.
tj: Updated to use EXPORT_SYMBOL_GPL() instead of EXPORT_SYMBOL() as
the only known user is an in-tree driver. Suggested by Sergei.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
This patch addresses the issue with ATA_CMD_PACKET pio mode
command for enumeration and device detection with ATAPI devices.
The X-Gene AHCI controller has an errata in which it cannot clear
the BSY bit after the PIO setup FIS. The dma state machine enters
CMFatalErrorUpdate state and locks up.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This patch fixes the big endian mode issue with function
xgene_ahci_read_id.
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Changes the spelling typos of removeable to removable where
ata_id_removeable is defined in ata.h and called in libata-scsi.c
respectively.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
- Fix a regression in leds-gpio introduced by a recent commit that
inadvertently changed the name of one of the properties used by
the driver (Fabio Estevam).
- Fix a regression in the ACPI backlight driver introduced by a
recent fix that missed one special case that had to be taken
into account (Aaron Lu).
- Drop the level of some new kernel messages from the ACPI core
introduced by a recent commit to KERN_DEBUG which they should
have used from the start and drop some other unuseful KERN_ERR
messages printed by ACPI (Rafael J Wysocki).
- Revert an incorrect commit modifying the cpupower tool
(Prarit Bhargava).
- Fix two regressions introduced by recent commits in the OPP
library and clean up some existing minor issues in that code
(Viresh Kumar).
- Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout
the tree (or drop it where that can be done) in order to make
it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki,
Ulf Hansson, Ludovic Desroches). There will be one more
"CONFIG_PM_RUNTIME removal" batch after this one, because some
new uses of it have been introduced during the current merge
window, but that should be sufficient to finally get rid of it.
- Make the ACPI EC driver more robust against race conditions
related to GPE handler installation failures (Lv Zheng).
- Prevent the ACPI device PM core code from attempting to
disable GPEs that it has not enabled which confuses ACPICA
and makes it report errors unnecessarily (Rafael J Wysocki).
- Add a "force" command line switch to the intel_pstate driver
to make it possible to override the blacklisting of some
systems in that driver if needed (Ethan Zhao).
- Improve intel_pstate code documentation and add a MAINTAINERS
entry for it (Kristen Carlson Accardi).
- Make the ACPI fan driver create cooling device interfaces
witn names that reflect the IDs of the ACPI device objects
they are associated with, except for "generic" ACPI fans
(PNP ID "PNP0C0B"). That's necessary for user space thermal
management tools to be able to connect the fans with the
parts of the system they are supposed to be cooling properly.
From Srinivas Pandruvada.
/
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Merge tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI and power management updates from Rafael Wysocki:
"These are regression fixes (leds-gpio, ACPI backlight driver,
operating performance points library, ACPI device enumeration
messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device
PM), some cleanups in the operating performance points (OPP)
framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of
minor intel_pstate driver changes, a new MAINTAINERS entry for it and
an ACPI fan driver change needed for better support of thermal
management in user space.
Specifics:
- Fix a regression in leds-gpio introduced by a recent commit that
inadvertently changed the name of one of the properties used by the
driver (Fabio Estevam).
- Fix a regression in the ACPI backlight driver introduced by a
recent fix that missed one special case that had to be taken into
account (Aaron Lu).
- Drop the level of some new kernel messages from the ACPI core
introduced by a recent commit to KERN_DEBUG which they should have
used from the start and drop some other unuseful KERN_ERR messages
printed by ACPI (Rafael J Wysocki).
- Revert an incorrect commit modifying the cpupower tool (Prarit
Bhargava).
- Fix two regressions introduced by recent commits in the OPP library
and clean up some existing minor issues in that code (Viresh
Kumar).
- Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the
tree (or drop it where that can be done) in order to make it
possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf
Hansson, Ludovic Desroches).
There will be one more "CONFIG_PM_RUNTIME removal" batch after this
one, because some new uses of it have been introduced during the
current merge window, but that should be sufficient to finally get
rid of it.
- Make the ACPI EC driver more robust against race conditions related
to GPE handler installation failures (Lv Zheng).
- Prevent the ACPI device PM core code from attempting to disable
GPEs that it has not enabled which confuses ACPICA and makes it
report errors unnecessarily (Rafael J Wysocki).
- Add a "force" command line switch to the intel_pstate driver to
make it possible to override the blacklisting of some systems in
that driver if needed (Ethan Zhao).
- Improve intel_pstate code documentation and add a MAINTAINERS entry
for it (Kristen Carlson Accardi).
- Make the ACPI fan driver create cooling device interfaces witn
names that reflect the IDs of the ACPI device objects they are
associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B").
That's necessary for user space thermal management tools to be able
to connect the fans with the parts of the system they are supposed
to be cooling properly. From Srinivas Pandruvada"
* tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
MAINTAINERS: add entry for intel_pstate
ACPI / video: update the skip case for acpi_video_device_in_dod()
power / PM: Eliminate CONFIG_PM_RUNTIME
NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
ACPI / EC: Fix unexpected ec_remove_handlers() invocations
Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()"
tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c
PM: Remove the SET_PM_RUNTIME_PM_OPS() macro
mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro
PM / Kconfig: Replace PM_RUNTIME with PM in dependencies
ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
ACPI / PM: Do not disable wakeup GPEs that have not been enabled
ACPI / utils: Drop error messages from acpi_evaluate_reference()
...
Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes, just
removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There are
some ath9k patches coming in through this tree that have been acked by
the wireless maintainers as they relied on the debugfs changes.
Everything has been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH:
"Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes,
just removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There
are some ath9k patches coming in through this tree that have been
acked by the wireless maintainers as they relied on the debugfs
changes.
Everything has been in linux-next for a while"
* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
fs: debugfs: add forward declaration for struct device type
firmware class: Deletion of an unnecessary check before the function call "vunmap"
firmware loader: fix hung task warning dump
devcoredump: provide a one-way disable function
device: Add dev_<level>_once variants
ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
ath: use seq_file api for ath9k debugfs files
debugfs: add helper function to create device related seq_file
drivers/base: cacheinfo: remove noisy error boot message
Revert "core: platform: add warning if driver has no owner"
drivers: base: support cpu cache information interface to userspace via sysfs
drivers: base: add cpu_device_create to support per-cpu devices
topology: replace custom attribute macros with standard DEVICE_ATTR*
cpumask: factor out show_cpumap into separate helper function
driver core: Fix unbalanced device reference in drivers_probe
driver core: fix race with userland in device_add()
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
fs: sysfs: return EGBIG on write if offset is larger than file size
...
After commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so Kconfig options
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.
Replace PM_RUNTIME with PM in Kconfig dependencies throughout the
tree.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Tejun Heo <tj@kernel.org>
Pull libata changes from Tejun Heo:
"The only interesting piece is the support for shingled drives. The
changes in libata layer are minimal. All it does is identifying the
new class of device and report upwards accordingly"
* 'for-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: Remove FIXME comment in atapi_request_sense()
sata_rcar: Document deprecated "renesas,rcar-sata"
sata_rcar: Add clocks to sata_rcar bindings
ahci_sunxi: Make AHCI_HFLAG_NO_PMP flag configurable with a module option
libata-scsi: Update SATL for ZAC drives
libata: Implement ATA_DEV_ZAC
libsas: use ata_dev_classify()
This patch is the usual mix of driver updates (srp, ipr, scsi_debug, NCR5380,
fnic, 53c974, ses, wd719x, hpsa, megaraid_sas). Of those, wd7a9x is new and
53c974 is a rewrite of the old tmscsim driver and the extensive work by Finn
Thain rewrites all the NCR5380 based drivers. There's also extensive
infrastructure updates: a new logging infrastructure for sense information and
a rewrite of the tagged command queue API and an assortment of minor updates.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"This patch is the usual mix of driver updates (srp, ipr, scsi_debug,
NCR5380, fnic, 53c974, ses, wd719x, hpsa, megaraid_sas).
Of those, wd7a9x is new and 53c974 is a rewrite of the old tmscsim
driver and the extensive work by Finn Thain rewrites all the NCR5380
based drivers.
There's also extensive infrastructure updates: a new logging
infrastructure for sense information and a rewrite of the tagged
command queue API and an assortment of minor updates"
* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (183 commits)
scsi: set fmt to NULL scsi_extd_sense_format() by default
libsas: remove task_collector mode
wd719x: remove dma_cache_sync call
scsi_debug: add Report supported opcodes+tmfs; Compare and write
scsi_debug: change SCSI command parser to table driven
scsi_debug: add Capacity Changed Unit Attention
scsi_debug: append inject error flags onto scsi_cmnd object
scsi_debug: pinpoint invalid field in sense data
wd719x: Add firmware documentation
wd719x: Introduce Western Digital WD7193/7197/7296 PCI SCSI card driver
eeprom-93cx6: Add (read-only) support for 8-bit mode
esas2r: fix an oversight in setting return value
esas2r: fix an error path in esas2r_ioctl_handler
esas2r: fir error handling in do_fm_api
scsi: add SPC-3 command definitions
scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16
scsi: remove scsi_driver owner field
scsi: move scsi_dispatch_cmd to scsi_lib.c
scsi: stop passing a gfp_mask argument down the command setup path
scsi: remove scsi_next_command
...
Conflicts:
drivers/scsi/scsi_debug.c
Agreed and tested resolution to a merge problem between a fix in scsi_debug
and a driver update
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Just like 0x1600 which got blacklisted by 66a7cbc303 ("ahci: disable
MSI instead of NCQ on Samsung pci-e SSDs on macbooks"), 0xa800 chokes
on NCQ commands if MSI is enabled. Disable MSI.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Dominik Mierzejewski <dominik@greysector.net>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=89171
Cc: stable@vger.kernel.org
Remove the FIXME comment in atapi_request_sense() asking whether
memset of sense buffer is necessary. The buffer may be partially or
fully filled by the device. We want it to be cleared.
tj: Updated description.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
irq_of_parse_and_map() returns 0 on error (the result is unsigned int),
so testing for negative result never works.
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
SPC-3 defines SERVICE ACTION IN(12) and SERVICE ACTION IN(16).
So rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 to be
consistent with SPC and to allow for better distinction.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Tested-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Drop the now unused reason argument from the ->change_queue_depth method.
Also add a return value to scsi_adjust_queue_depth, and rename it to
scsi_change_queue_depth now that it can be used as the default
->change_queue_depth implementation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
The use of the AHCI_HFLAG_NO_PMP flag is something which we inherited from
the Allwinner android kernel sources, and I've always wanted to test if this
is really necessary.
So recently I've bought a sata port multiplexer, and I've given this a test
spin on both A10 and A20 devices, and it seems to work fine:
[ 2.154456] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 2.161092] ata1.15: Port Multiplier 1.2, 0x197b:0x0325 r0, 5 ports, feat 0x5/0xf
[ 2.175511] ata1.00: hard resetting link
[ 2.524929] ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[ 2.531430] ata1.01: hard resetting link
[ 2.974465] ata1.01: link resume succeeded after 1 retries
[ 3.094932] ata1.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 3.101431] ata1.02: hard resetting link
[ 4.174466] ata1.02: failed to resume link (SControl 0)
[ 4.180065] ata1.02: SATA link down (SStatus 0 SControl 0)
(and the same for links 3 and 4)
Once the NO_PMP flag is removed it correctly sees the 2 disks which I've
attached, and I can mount and use them just fine.
Unfortunately when I then directly attached a disk to the sata port on the
sunxi SoC, and booted a kernel without the AHCI_HFLAG_NO_PMP flag, it would
not recognize that disk.
It turns out that the sata controller in the sunxi SoCs fails to handle
soft-resets issued to directly attached disks, and when pmp support is
enabled the kernel will always issue a soft-reset.
So add a module parameter to enable pmp usage, and default this to off, so
that directly attached disks keep working normally.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Remove the tagged argument from scsi_adjust_queue_depth, and just let it
handle the queue depth. For most drivers those two are fairly separate,
given that most modern drivers don't care about the SCSI "tagged" status
of a command at all, and many old drivers allow queuing of multiple
untagged commands in the driver.
Instead we start out with the ->simple_tags flag set before calling
->slave_configure, which is how all drivers actually looking at
->simple_tags except for one worke anyway. The one other case looks
broken, but I've kept the behavior as-is for now.
Except for that we only change ->simple_tags from the ->change_queue_type,
and when rejecting a tag message in a single driver, so keeping this
churn out of scsi_adjust_queue_depth is a clear win.
Now that the usage of scsi_adjust_queue_depth is more obvious we can
also remove all the trivial instances in ->slave_alloc or ->slave_configure
that just set it to the cmd_per_lun default.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
ZAC (zoned-access command) drives translate into ZBC (Zoned block
command) device type for SCSI. So implement the correct mappings
into libata-scsi and update the SCSI command set versions.
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Add new ATA device type for ZAC devices.
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Changes into the AHCI subsystem have introduced a bug by not taking into
account the force_port_map and mask_port_map parameters when using the
ahci_pci_save_initial_config function. This commit fixes it by setting
the internal parameters of the ahci_port_priv structure.
Fixes: 725c7b570f
Reported-and-tested-by: Zlatko Calusic <zcalusic@bitsync.net>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
This patch adds the AHCI-mode SATA Device IDs for the Intel Sunrise Point PCH.
Signed-off-by: James Ralston <james.d.ralston@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Samsung pci-e SSDs on macbooks failed miserably on NCQ commands, so
67809f85d3 ("ahci: disable NCQ on Samsung pci-e SSDs on macbooks")
disabled NCQ on them. It turns out that NCQ is fine as long as MSI is
not used, so let's turn off MSI and leave NCQ on.
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=60731
Tested-by: <dorin@i51.org>
Tested-by: Imre Kaloz <kaloz@openwrt.org>
Cc: stable@vger.kernel.org
Fixes: 67809f85d3 ("ahci: disable NCQ on Samsung pci-e SSDs on macbooks")
This reverts commit 33fb0d01ce.
18dcf433f3 ("AHCI: Optimize single IRQ interrupt processing") is
scheduled to be reverted. This is an optimization dependent on the
mentioned commit. Revert it first.
Signed-off-by: Tejun Heo <tj@kernel.org>
Unlike other SATA R-Car r8a7790 controllers the r8a7790 ES1 SATA R-Car
controller needs to be run with DIPM disabled.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Pull slave-dmaengine updates from Vinod Koul:
"For dmaengine contributions we have:
- designware cleanup by Andy
- my series moving device_control users to dmanegine_xxx APIs for
later removal of device_control API
- minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma
etc"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits)
serial: atmel: add missing dmaengine header
dmaengine: remove FSLDMA_EXTERNAL_START
dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method
carma-fpga: move to fsl_dma_external_start()
carma-fpga: use dmaengine_xxx() API
dmaengine: freescale: add and export fsl_dma_external_start()
dmaengine: add dmaengine_prep_dma_sg() helper
video: mx3fb: use dmaengine_terminate_all() API
serial: sh-sci: use dmaengine_terminate_all() API
net: ks8842: use dmaengine_terminate_all() API
mtd: sh_flctl: use dmaengine_terminate_all() API
mtd: fsmc_nand: use dmaengine_terminate_all() API
V4L2: mx3_camer: use dmaengine_pause() API
dmaengine: coh901318: use dmaengine_terminate_all() API
pata_arasan_cf: use dmaengine_terminate_all() API
dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause()
dmaengine: dw: export probe()/remove() and Co to users
dmaengine: dw: enable and disable controller when needed
dmaengine: dw: always export dw_dma_{en,dis}able
dmaengine: dw: introduce dw_dma_on() helper
...
The drivers should use dmaengine_terminate_all() API instead of accessing
the device_control which will be deprecated soon
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Pull libata update from Tejun Heo:
"AHCI is getting per-port irq handling and locks for better
scalability. The gain is not huge but measureable with multiple high
iops devices connected to the same host; however, the value of
threaded IRQ handling seems negligible for AHCI and it likely will
revert to non-threaded handling soon.
Another noteworthy change is George Spelvin's "libata: Un-break ATA
blacklist". During 3.17 devel cycle, the libata blacklist glob
matching got generalized and rewritten; unfortunately, the patch
forgot to swap arguments to match the new match function and ended up
breaking blacklist matching completely. It got noticed only a couple
days ago so it couldn't make for-3.17-fixes either. :(
Other than the above two, nothing too interesting - the usual cleanup
churns and device-specific changes"
* 'for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (22 commits)
pata_serverworks: disable 64-KB DMA transfers on Broadcom OSB4 IDE Controller
libata: Un-break ATA blacklist
AHCI: Do not acquire ata_host::lock from single IRQ handler
AHCI: Optimize single IRQ interrupt processing
AHCI: Do not read HOST_IRQ_STAT reg in multi-MSI mode
AHCI: Make few function names more descriptive
AHCI: Move host activation code into ahci_host_activate()
AHCI: Move ahci_host_activate() function to libahci.c
AHCI: Pass SCSI host template as arg to ahci_host_activate()
ata: pata_imx: Use the SIMPLE_DEV_PM_OPS() macro
AHCI: Cleanup checking of multiple MSIs/SLM modes
libata-sff: Fix controllers with no ctl port
ahci_xgene: Fix the error print invalid resource for APM X-Gene SoC AHCI SATA Host Controller driver.
libata: change ata_<foo>_printk routines to return void
ata: qcom: Add device tree bindings information
ahci-platform: Bump max number of clocks to 5
ahci: ahci_p5wdh_workaround - constify DMI table
libahci_platform: Staticize ahci_platform_<en/dis>able_phys()
pata_platform: Remove useless irq_flags field
pata_of_platform: Remove "electra-ide" quirk
...
These are bug fixes for harmless problems that were not important
enough to get fixed in 3.17. The majority of these are OMAP specific,
but there are also a couple for Marvell mvebu, cns3xxx, and others,
as well as some updates for the MAINTAINERS file.
In particular, Robert Jarzmik and Daniel Mack now volunteered to help
out maintaining the PXA platform, Krzysztof Halasa took over the
cns3xxx platform, Carlo Caione is the maintainer for the new Amlogic
meson platform, and Matthias Brugger is now listed for the mediatek
platform he recently contributed.
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Merge tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical bug fixes from Arnd Bergmann:
"These are bug fixes for harmless problems that were not important
enough to get fixed in 3.17. The majority of these are OMAP specific,
but there are also a couple for Marvell mvebu, cns3xxx, and others, as
well as some updates for the MAINTAINERS file.
In particular, Robert Jarzmik and Daniel Mack now volunteered to help
out maintaining the PXA platform, Krzysztof Halasa took over the
cns3xxx platform, Carlo Caione is the maintainer for the new Amlogic
meson platform, and Matthias Brugger is now listed for the mediatek
platform he recently contributed"
* tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (42 commits)
MAINTAINERS: update Shawn's email address
MAINTAINERS: condense some Tegra related entries
MAINTAINERS: add Alexandre Courbot for Tegra
MAINTAINERS: CNS3xxx and IXP4xx update.
MAINTAINERS: Add maintainers entry for Mediatek SoCs
arm, vt8500, LLVMLlinux: Use mcr instead of mcr% for mach-vt8500
MAINTAINERS: add a third maintainer to mach-bcm
CNS3xxx: Fix PCIe read size limit.
CNS3xxx: Fix logical PCIe topology.
CNS3xxx: Fix debug UART.
MAINTAINERS: Add entry for the Amlogic MesonX SoCs
MAINTAINERS: update ARM pxa maintainers
ARM: at91/PMC: don't forget to write PMC_PCDR register to disable clocks
ARM: at91: fix at91sam9263ek DT mmc pinmuxing settings
ARM: mvebu: Netgear RN102: Use Hardware BCH ECC
ARM: Kirkwood: Fix DT based DSA.
ARM: OMAP2+: make of_device_ids const
ARM: omap2: make arrays containing machine compatible strings const
ARM: LPC32xx: Fix reset function
ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC
...
The Broadcom OSB4 IDE Controller (vendor and device IDs: 1166:0211)
does not support 64-KB DMA transfers.
Whenever a 64-KB DMA transfer is attempted,
the transfer fails and messages similar to the following
are written to the console log:
[ 2431.851125] sr 0:0:0:0: [sr0] Unhandled sense code
[ 2431.851139] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 2431.851152] sr 0:0:0:0: [sr0] Sense Key : Hardware Error [current]
[ 2431.851166] sr 0:0:0:0: [sr0] Add. Sense: Logical unit communication time-out
[ 2431.851182] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 76 f4 00 00 40 00
[ 2431.851210] end_request: I/O error, dev sr0, sector 121808
When the libata and pata_serverworks modules
are recompiled with ATA_DEBUG and ATA_VERBOSE_DEBUG defined in libata.h,
the 64-KB transfer size in the scatter-gather list can be seen
in the console log:
[ 2664.897267] sr 9:0:0:0: [sr0] Send:
[ 2664.897274] 0xf63d85e0
[ 2664.897283] sr 9:0:0:0: [sr0] CDB:
[ 2664.897288] Read(10): 28 00 00 00 7f b4 00 00 40 00
[ 2664.897319] buffer = 0xf6d6fbc0, bufflen = 131072, queuecommand 0xf81b7700
[ 2664.897331] ata_scsi_dump_cdb: CDB (1:0,0,0) 28 00 00 00 7f b4 00 00 40
[ 2664.897338] ata_scsi_translate: ENTER
[ 2664.897345] ata_sg_setup: ENTER, ata1
[ 2664.897356] ata_sg_setup: 3 sg elements mapped
[ 2664.897364] ata_bmdma_fill_sg: PRD[0] = (0x66FD2000, 0xE000)
[ 2664.897371] ata_bmdma_fill_sg: PRD[1] = (0x65000000, 0x10000)
------------------------------------------------------> =======
[ 2664.897378] ata_bmdma_fill_sg: PRD[2] = (0x66A10000, 0x2000)
[ 2664.897386] ata1: ata_dev_select: ENTER, device 0, wait 1
[ 2664.897422] ata_sff_tf_load: feat 0x1 nsect 0x0 lba 0x0 0x0 0xFC
[ 2664.897428] ata_sff_tf_load: device 0xA0
[ 2664.897448] ata_sff_exec_command: ata1: cmd 0xA0
[ 2664.897457] ata_scsi_translate: EXIT
[ 2664.897462] leaving scsi_dispatch_cmnd()
[ 2664.897497] Doing sr request, dev = sr0, block = 0
[ 2664.897507] sr0 : reading 64/256 512 byte blocks.
[ 2664.897553] ata_sff_hsm_move: ata1: protocol 7 task_state 1 (dev_stat 0x58)
[ 2664.897560] atapi_send_cdb: send cdb
[ 2666.910058] ata_bmdma_port_intr: ata1: host_stat 0x64
[ 2666.910079] __ata_sff_port_intr: ata1: protocol 7 task_state 3
[ 2666.910093] ata_sff_hsm_move: ata1: protocol 7 task_state 3 (dev_stat 0x51)
[ 2666.910101] ata_sff_hsm_move: ata1: protocol 7 task_state 4 (dev_stat 0x51)
[ 2666.910129] sr 9:0:0:0: [sr0] Done:
[ 2666.910136] 0xf63d85e0 TIMEOUT
lspci shows that the driver used for the Broadcom OSB4 IDE Controller is
pata_serverworks:
00:0f.1 IDE interface: Broadcom OSB4 IDE Controller (prog-if 8e [Master SecP SecO PriP])
Flags: bus master, medium devsel, latency 64
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1]
I/O ports at 0170 [size=8]
I/O ports at 0374 [size=4]
I/O ports at 1440 [size=16]
Kernel driver in use: pata_serverworks
The pata_serverworks driver supports five distinct device IDs,
one being the OSB4 and the other four belonging to the CSB series.
The CSB series appears to support 64-KB DMA transfers,
as tests on a machine with an SAI2 motherboard
containing a Broadcom CSB5 IDE Controller (vendor and device IDs: 1166:0212)
showed no problems with 64-KB DMA transfers.
This problem was first discovered when attempting to install openSUSE
from a DVD on a machine with an STL2 motherboard.
Using the pata_serverworks module,
older releases of openSUSE will not install at all due to the timeouts.
Releases of openSUSE prior to 11.3 can be installed by disabling
the pata_serverworks module using the brokenmodules boot parameter,
which causes the serverworks module to be used instead.
Recent releases of openSUSE (12.2 and later) include better error recovery and
will install, though very slowly.
On all openSUSE releases, the problem can be recreated
on a machine containing a Broadcom OSB4 IDE Controller
by mounting an install DVD and running a command similar to the following:
find /mnt -type f -print | xargs cat > /dev/null
The patch below corrects the problem.
Similar to the other ATA drivers that do not support 64-KB DMA transfers,
the patch changes the ata_port_operations qc_prep vector to point to a routine
that breaks any 64-KB segment into two 32-KB segments and
changes the scsi_host_template sg_tablesize element to reduce by half
the number of scatter/gather elements allowed.
These two changes affect only the OSB4.
Signed-off-by: Scott Carter <ccscott@funsoft.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
lib/glob.c provides a new glob_match() function, with arguments in
(pattern, string) order. It replaced a private function with arguments
in (string, pattern) order, but I didn't swap the call site...
The result was the entire ATA blacklist was effectively disabled.
The lesson for today is "I f***ed up *how* badly *how* many months ago?",
er, I mean "Nobody Tests RC Kernels On Legacy Hardware".
This was not a subtle break, but it made it through an entire RC
cycle unreported, presumably because all the people doing testing
have full-featured hardware.
(FWIW, the reason for the argument swap was because fnmatch() does it that
way, and for a while implementing a full fnmatch() was being considered.)
Fixes: 428ac5fc05 (libata: Use glob_match from lib/glob.c)
Reported-by: Steven Honeyman <stevenhoneyman@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=71371#c21
Signed-off-by: George Spelvin <linux@horizon.com>
Cc: <stable@vger.kernel.org> # 3.17
Tested-by: Steven Honeyman <stevenhoneyman@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
There is no need to acquire ata_host::lock spinlock from
hardware context single IRQ interrupt handler since the
handler does not access host data that could be altered
by concurrent processors.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
Split interrupt service routine into hardware context handler
and threaded context handler. That allows to protect ports with
individual locks rather than with a single host-wide lock and
move port interrupts handling out of the hardware interrupt
context.
Testing was done by transferring 8GB on two hard drives in
parallel using command 'dd if=/dev/sd{a,b} of=/dev/null'. With
lock_stat statistics I measured access times to ata_host::lock
spinlock (since interrupt handler code is fully embraced with
this lock). The average lock's holdtime decreased eight times
while average waittime decreased two times.
Both before and after the change the transfer time is the same,
while 'perf record -e cycles:k ...' shows 1%-4% CPU time spent
in ahci_single_irq_intr() routine before the update and not even
sampled/shown ahci_single_irq_intr() after the update.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
As described in AHCI v1.0 specification chapter 10.6.2.2
"Multiple MSI Based Messages" generation of interrupts
is not controlled through the HOST_IRQ_STAT register.
Considering MMIO access is expensive remove unnecessary
reading and writing of HOST_IRQ_STAT register.
Further, serializing access to the host data is no longer
needed and the interrupt service routine can avoid competing
on the host lock.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Suggested-by: "Jiang, Dave" <dave.jiang@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "Jiang, Dave" <dave.jiang@intel.com>
Cc: linux-ide@vger.kernel.org
Currently host activation done by calling either function
ahci_host_activate() or ata_host_activate(). Consolidate
the code by only calling ahci_host_activate() for all AHCI
devices.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
This update is a prerequisite for consolidation of
AHCI host activation code within ahci_host_activate()
function.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
This update is a prerequisite for consolidation of
AHCI host activation code within ahci_host_activate()
function.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
Using the SIMPLE_DEV_PM_OPS() macro can make the code shorter and cleaner.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Hannes Reinecke