Pull block fixes from Jens Axboe:
"A collection of fixes from the past few weeks that should go into 4.5.
This contains:
- Overflow fix for sysfs discard show function from Alan.
- A stacking limit init fix for max_dev_sectors, so we don't end up
artificially capping some use cases. From Keith.
- Have blk-mq proper end unstarted requests on a dying queue, instead
of pushing that to the driver. From Keith.
- NVMe:
- Update to Kconfig description for NVME_SCSI, since it was
vague and having it on is important for some SUSE distros.
From Christoph.
- Set of fixes from Keith, around surprise removal. Also kills
the no-merge flag, so it supports merging.
- Set of fixes for lightnvm from Matias, Javier, and Wenwei.
- Fix null_blk oops when asked for lightnvm, but not available. From
Matias.
- Copy-to-user EINTR fix from Hannes, fixing a case where SG_IO fails
if interrupted by a signal.
- Two floppy fixes from Jiri, fixing signal handling and blocking
open.
- A use-after-free fix for O_DIRECT, from Mike Krinkin.
- A block module ref count fix from Roman Pen.
- An fs IO wait accounting fix for O_DSYNC from Stephane Gasparini.
- Smaller reallo fix for xen-blkfront from Bob Liu.
- Removal of an unused struct member in the deadline IO scheduler,
from Tahsin.
- Also from Tahsin, properly initialize inode struct members
associated with cgroup writeback, if enabled.
- From Tejun, ensure that we keep the superblock pinned during cgroup
writeback"
* 'for-linus' of git://git.kernel.dk/linux-block: (25 commits)
blk: fix overflow in queue_discard_max_hw_show
writeback: initialize inode members that track writeback history
writeback: keep superblock pinned during cgroup writeback association switches
bio: return EINTR if copying to user space got interrupted
NVMe: Rate limit nvme IO warnings
NVMe: Poll device while still active during remove
NVMe: Requeue requests on suspended queues
NVMe: Allow request merges
NVMe: Fix io incapable return values
blk-mq: End unstarted requests on dying queue
block: Initialize max_dev_sectors to 0
null_blk: oops when initializing without lightnvm
block: fix module reference leak on put_disk() call for cgroups throttle
nvme: fix Kconfig description for BLK_DEV_NVME_SCSI
kernel/fs: fix I/O wait not accounted for RW O_DSYNC
floppy: refactor open() flags handling
lightnvm: allow to force mm initialization
lightnvm: check overflow and correct mlc pairs
lightnvm: fix request intersection locking in rrpc
lightnvm: warn if irqs are disabled in lock laddr
...
Pull drm fixes from Dave Airlie:
"This has two main sets of fixes:
- A bunch of Exynos fixes, mainly for their MIC component.
- vblank regression fixes from Mario, apparantly some changes in 4.4
caused some vblank breakage on radeon/nouveau, this set fixes all
the issues seen.
There is also a revert of one of the MST changse, that I was
overzealous in including, that broke 30" MST monitors, and two qxl
fixes"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/qxl: fix erroneous return value
drm/nouveau/display: Enable vblank irqs after display engine is on again.
drm/radeon/pm: Handle failure of drm_vblank_get.
drm: Fix treatment of drm_vblank_offdelay in drm_vblank_on() (v2)
drm: Fix drm_vblank_pre/post_modeset regression from Linux 4.4
drm: Prevent vblank counter bumps > 1 with active vblank clients. (v2)
drm: No-Op redundant calls to drm_vblank_off() (v2)
drm/qxl: use kmalloc_array to alloc reloc_info in qxl_process_single_command
Revert "drm/dp/mst: change MST detection scheme"
drm/exynos/decon: fix disable clocks order
drm/exynos: fix incorrect cpu address for dma_mmap_attrs()
drm/exynos: exynos5433_decon: fix wrong state in decon_vblank_enable
drm/exynos: exynos5433_decon: fix wrong state assignment in decon_enable
drm/exynos: dsi: restore support for drm bridge
drm/exynos: mic: make all functions static
drm/exynos: mic: convert to component framework
drm/exynos: mic: use devm_clk interface
drm/exynos: fix types for compilation on 64bit architectures
drm/exynos: ipp: fix incorrect format specifiers in debug messages
drm/exynos: depend on ARCH_EXYNOS for DRM_EXYNOS
The first is something that has come up a few times and has been
worked out individually, but it's come up now enough that the problem
should be generic. Tracepoints are protected by RCU sched. There are
several tracepoints within core infrastructure like kfree().
If a tracepoint is called when the CPU is going down, or when it's
coming up but has yet to be recognized by RCU, a RCU warning is
triggered. This is a true bug as that tracepoint is not protected by
RCU. Usually, this is taken care of by testing for cpu online as
a tracepoint condition. But as this is happening more often, moving
it from a individual tracepoint to a check in the tracepoint infrastructure
is more robust.
Note, there is now a duplicate of a cpu online test, because this update
does not remove the individual checks. But the overhead is small enough
that the removal can be done in another release.
The second change is strange linker breakage due to the branch tracer's
builtin_constant_p() check failing, and treating the condition as a
variable instead of a constant. Arnd Bergmann found that this can be
fixed by testing !!(cond) instead of just (cond).
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Merge tag 'trace-fixes-v4.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"This includes two fixes.
The first is something that has come up a few times and has been
worked out individually, but it's come up now enough that the problem
should be generic. Tracepoints are protected by RCU sched. There are
several tracepoints within core infrastructure like kfree(). If a
tracepoint is called when the CPU is going down, or when it's coming
up but has yet to be recognized by RCU, a RCU warning is triggered.
This is a true bug as that tracepoint is not protected by RCU.
Usually, this is taken care of by testing for cpu online as a
tracepoint condition. But as this is happening more often, moving it
from a individual tracepoint to a check in the tracepoint
infrastructure is more robust.
Note, there is now a duplicate of a cpu online test, because this
update does not remove the individual checks. But the overhead is
small enough that the removal can be done in another release.
The second change is strange linker breakage due to the branch
tracer's builtin_constant_p() check failing, and treating the
condition as a variable instead of a constant. Arnd Bergmann found
that this can be fixed by testing !!(cond) instead of just (cond)"
* tag 'trace-fixes-v4.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix freak link error caused by branch tracer
tracepoints: Do not trace when cpu is offline
Revert 8affb487d4 ("x86/PCI: Don't alloc pcibios-irq when MSI is
enabled").
This is part of reverting 991de2e590 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e590 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
CC: Joerg Roedel <jroedel@suse.de>
Function its_alloc_tables() maintains two local variables, "order" and
and "alloc_size", to hold memory size that has been allocated to
ITS_BASEn. We don't always refresh the variable alloc_size whenever
value of the variable order changes, causing the following two
problems.
- Cache flush operation with size more than required.
- Information reported by pr_info is not correct.
Use a helper macro that converts page order to size in bytes instead of
variable "alloc_size" to fix both the problems.
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
We get this right for queue_discard_max_show but not max_hw_show. Follow the
same pattern as queue_discard_max_show instead so that we don't truncate.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
On Mon, 15 Feb 2016, Trond Myklebust wrote:
> Hi Scott,
>
> On Mon, Feb 15, 2016 at 2:28 PM, Scott Mayhew <smayhew@redhat.com> wrote:
> > md5 is disabled in fips mode, and attempting to import a gss context
> > using md5 while in fips mode will result in crypto_alg_mod_lookup()
> > returning -ENOENT, which will make its way back up to
> > gss_pipe_downcall(), where the BUG() is triggered. Handling the -ENOENT
> > allows for a more graceful failure.
> >
> > Signed-off-by: Scott Mayhew <smayhew@redhat.com>
> > ---
> > net/sunrpc/auth_gss/auth_gss.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
> > index 799e65b..c30fc3b 100644
> > --- a/net/sunrpc/auth_gss/auth_gss.c
> > +++ b/net/sunrpc/auth_gss/auth_gss.c
> > @@ -737,6 +737,9 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
> > case -ENOSYS:
> > gss_msg->msg.errno = -EAGAIN;
> > break;
> > + case -ENOENT:
> > + gss_msg->msg.errno = -EPROTONOSUPPORT;
> > + break;
> > default:
> > printk(KERN_CRIT "%s: bad return from "
> > "gss_fill_context: %zd\n", __func__, err);
> > --
> > 2.4.3
> >
>
> Well debugged, but I unfortunately do have to ask if this patch is
> sufficient? In addition to -ENOENT, and -ENOMEM, it looks to me as if
> crypto_alg_mod_lookup() can also fail with -EINTR, -ETIMEDOUT, and
> -EAGAIN. Don't we also want to handle those?
You're right, I was focusing on the panic that I could easily reproduce.
I'm still not sure how I could trigger those other conditions.
>
> In fact, peering into the rats nest that is
> gss_import_sec_context_kerberos(), it looks as if that is just a tiny
> subset of all the errors that we might run into. Perhaps the right
> thing to do here is to get rid of the BUG() (but keep the above
> printk) and just return a generic error?
That sounds fine to me -- updated patch attached.
-Scott
>From d54c6b64a107a90a38cab97577de05f9a4625052 Mon Sep 17 00:00:00 2001
From: Scott Mayhew <smayhew@redhat.com>
Date: Mon, 15 Feb 2016 15:12:19 -0500
Subject: [PATCH] auth_gss: remove the BUG() from gss_pipe_downcall()
Instead return a generic error via gss_msg->msg.errno. None of the
errors returned by gss_fill_context() should necessarily trigger a
kernel panic.
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The newly added NFS v4.2 operations (ALLOCATE, DEALLOCATE, SEEK and CLONE)
use a helper called nfs42_set_rw_stateid to select a stateid that is sent
to the server. But they don't set the inode and state fields in the
nfs4_exception structure, and this don't partake in the stateid recovery
protocol. Because of this they will simply return errors insted of trying
to recover a stateid when the server return a BAD_STATEID error.
Additionally CLONE has the problem that it operates on two files and thus
two stateids, and thus needs to call the exception handler twice to
recover stateids.
While we're at it stop grabbing an addititional reference to the open
context in all these operations - having the file open guarantees that
the open context won't go away.
All this can be produces with the generic/168 and generic/170 tests in
xfstests which stress the CLONE stateid handling.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
In the case where d_add_unique() finds an appropriate alias to use it will
have already incremented the reference count. An additional dget() to swap
the open context's dentry is unnecessary and will leak a reference.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 275bb30786 ("NFSv4: Move dentry instantiation into the NFSv4-...")
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
The cpsw-phy-sel driver supports only MII, RMII, and RGMII PHY modes,
and silently handled any other values as if MII was specified. In a
case where the PHY mode was incorrectly specified, or a bug elsewhere,
there would be no indication of a problem. If MII was the correct mode,
then this will go unnoticed, otherwise the symptom will be a failure
to transmit/receive data over the RMII/RGMII link.
Add a dev_warn() to make this condition obvious and provide a
breadcrumb to follow.
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David Rivshin <drivshin@allworx.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
genphy_config_init() masked out pause flags set in phy driver structure.
Pause flags needs to be preserved in phydev->supported &
phydev->advertising.
Signed-off-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Or Gerlitz says:
====================
Mellanox 10/40G mlx4 driver fixes for 4.5-rc
Bunch of fixes from the team to the mlx4 Eth and core drivers.
Series generated against net commit aac8d3c "qmi_wwan: add "4G LTE usb-modem U901""
Please push patches 1,2 and 6 to -stable as well
changes from v0:
- handled another wrongly accounted HW counter in patch #1 (Rick)
- fixed coding style issues in patch #4 (Sergei)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
It's forbidden to manually change dev->features in run-time. Currently, this is
done in the driver to make sure that GSO_UDP_TUNNEL is advertized only when
VXLAN tunnel is set. However, since the stack actually does features intersection
with hw_enc_features, we can safely revert to advertizing features early when
registering the netdevice.
Fixes: f4a1edd561 ('net/mlx4_en: Advertize encapsulation offloads [...]')
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
problem description:
The current code sets UAR page size equal to system page size.
The ConnectX-3 and ConnectX-3 Pro HWs require minimum 128 UAR pages.
The mlx4 kernel drivers are not loaded if there is less than 128 UAR pages.
solution:
Always set UAR page to 4KB. This allows more UAR pages if the OS
has PAGE_SIZE larger than 4KB. For example, PowerPC kernel use 64KB
system page size, with 4MB uar region, there are 4MB/2/64KB = 32
uars (half for uar, half for blueflame). This does not meet minimum 128
UAR pages requirement. With 4KB UAR page, there are 4MB/2/4KB = 512 uars
which meet the minimum requirement.
Note that only codes in mlx4_core that deal with firmware know that uar
page size is 4KB. Codes that deal with usr page in cq and qp context
(mlx4_ib, mlx4_en and part of mlx4_core) still have the same assumption
that uar page size equals to system page size.
Note that with this implementation, on 64KB system page size kernel, there
are 16 uars per system page but only one uars is used. The other 15
uars are ignored because of the above assumption.
Regarding SR-IOV, mlx4_core in hypervisor will set the uar page size
to 4KB and mlx4_core code in virtual OS will obtain the uar page size from
firmware.
Regarding backward compatibility in SR-IOV, if hypervisor has this new code,
the virtual OS must be updated. If hypervisor has old code, and the virtual
OS has this new code, the new code will be backward compatible with the
old code. If the uar size is big enough, this new code in VF continues to
work with 64 KB uar page size (on PowerPc kernel). If the uar size does not
meet 128 uars requirement, this new code not loaded in VF and print the same
error message as the old code in Hypervisor.
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The PCI channel could go offline during reset due to EEH. Don't bug on in
this case, the error is recoverable.
Fixes: f6bc11e426 ('net/mlx4_core: Enhance the catas flow to support device reset')
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The error flow in procedure handle_existing_counter() is wrong.
The procedure should exit after encountering the error, not continue
as if everything is OK.
Fixes: 68230242cd ('net/mlx4_core: Add port attribute when tracking counters')
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
Previously, the shift value used for time-stamping was constant and didn't
depend on the HW chip frequency. Change that to take the frequency into account
and calculate the maximal value in cycles per wraparound of ten seconds. This
time slot was chosen since it gives a good accuracy in time synchronization.
Algorithm for shift value calculation:
* Round up the maximal value in cycles to nearest power of two
* Calculate maximal multiplier by division of all 64 bits set
to above result
* Then, invert the function clocksource_khz2mult() to get the shift from
maximal mult value
Fixes: ec693d4701 ('net/mlx4_en: Add HW timestamping (TS) support')
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
RdropOvflw counts overrun of HW buffer, therefore should
be used for rx_fifo_errors only.
Currently RdropOvflw counter is mistakenly also set into
rx_missed_errors and rx_over_errors too, which makes the
device total dropped packets accounting to show wrong results.
Fix that. Use it for rx_fifo_errors only.
Fixes: c27a02cd94 ('mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC')
Signed-off-by: Amir Vadai <amir@vadai.me>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some NFSv4.1 OPEN requests were hanging waiting for the NFS server
to finish recalling delegations. Turns out that each NFSv4.1 CB
request on RDMA gets a GARBAGE_ARGS reply from the Linux client.
Commit 756b9b37cf added a line in bc_svc_process that
overwrites the incoming rq_rcv_buf's length with the value in
rq_private_buf.len. But rpcrdma_bc_receive_call() does not invoke
xprt_complete_bc_request(), thus rq_private_buf.len is not
initialized. svc_process_common() is invoked with a zero-length
RPC message, and fails.
Fixes: 756b9b37cf ('SUNRPC: Fix callback channel')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Report that driver supports IB_PMA_CLASS_CAP_EXT_WIDTH in respond for
IB_MGMT_CLASS_PERF_MGMT mad with IB_PMA_CLASS_PORT_INFO attr id.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
When attribute IB_PMA_PORT_COUNTERS_EXT is set, we now return 64 bit
values for the counters.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Today ocrdma driver defer arming the CQ till poll is called.
This was used to prevent calling poll-cq on an armed CQ.
Recently a set of new CQ API has been introduced into the linux
kernel. The implementation of this API guarantees that a given
CQ is never armed before calling poll on it. Most of the kernel
ULPs have already moved to use this new API or have a code where
poll is called before arming the CQ.
Thus, the above workaround in ocrdma is not needed anymore.
This patch removes the additional logic to deffer arm till poll
is called. This patch adds a simple scheme where ib_req_notify_cq()
will actually arm the cq.
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Commit 754fe4a92c ("usb: musb: Remove ifdefs for TX DMA for musb_host.c")
introduces a problem setting the desired channel mode for the Mentor DMA
engine.
There is a case where an address is incorrectly assigned to the DMA
channel desired mode when it should instead be assigned the actual mode
value. This results in the value of channel->desired_mode not being
correct.
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Quite often drivers set only "write" permission assuming that this
includes "read" permission as well and this works on plenty of
platforms. However IODA2 is strict about this and produces an EEH when
"read" permission is not set and reading happens.
This adds a workaround in the IODA code to always add the "read" bit
when the "write" bit is set.
Fixes: 10b35b2b74 ("powerpc/powernv: Do not set "read" flag if direction==DMA_NONE")
Cc: stable@vger.kernel.org # 4.2+
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This patch ensures that devices, which got registered before arch_initcall
will be handled correctly by IOMMU-based DMA-mapping code.
Cc: <stable@vger.kernel.org>
Fixes: 13b8629f65 ("arm64: Add IOMMU dma_ops")
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Looks like g4x hpd live status bits actually agree with the spec. At
least they do on the machine I have, and apparently on Nick Bowler's
g4x as well.
So gm45 may be the only platform where they don't agree. At least
that seems to be the case based on the (somewhat incomplete)
logs/dumps in [1], and Daniel has also tested this on his gm45
sometime in the past.
So let's change the bits to match the spec on g4x. That actually makes
the g4x bits identical to vlv/chv so we can just share the code
between those platforms, leaving gm45 as the special case.
[1] https://bugzilla.kernel.org/show_bug.cgi?id=52361
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Sonika Jindal <sonika.jindal@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Nick Bowler <nbowler@draconx.ca>
References: https://lists.freedesktop.org/archives/dri-devel/2016-February/100382.html
Reported-by: Nick Bowler <nbowler@draconx.ca>
Cc: stable@vger.kernel.org
Fixes: 237ed86c69 ("drm/i915: Check live status before reading edid")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1455127145-20087-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 0780cd36c7)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
If CPU_UP_PREPARE is called it is not guaranteed, that a previously allocated
and assigned hash has been freed already, but perf_event_init_cpu()
unconditionally allocates and assignes a new hash if the swhash is referenced.
By overwriting the pointer the existing hash is not longer accessible.
Verify that there is no hash assigned on this cpu before allocating and
assigning a new one.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20160209201007.843269966@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
If CPU_DOWN_PREPARE fails the perf hotplug notifier is called for
CPU_DOWN_FAILED and calls perf_event_init_cpu(), which checks whether the
swhash is referenced. If yes it allocates a new hash and stores the pointer in
the per cpu data structure.
But at this point the cpu is still online, so there must be a valid hash
already. By overwriting the pointer the existing hash is not longer
accessible.
Remove the CPU_DOWN_FAILED state, as there is nothing to (re)allocate.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20160209201007.763417379@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
If CPU_UP_PREPARE fails the perf hotplug code calls perf_event_exit_cpu(),
which is a pointless exercise. The cpu is not online, so the smp function
calls return -ENXIO. So the result is a list walk to call noops.
Remove it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20160209201007.682184765@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
CPU boot configuration writes to shmobile_boot_arg, which is located in
the .text section, and thus should not be written to.
As of commit 1d33a354bb ("ARM: shmobile: Per-CPU SMP boot / sleep
code for SCU SoCs"), and ignoring accidental remainings,
shmobile_boot_arg is always set to MPIDR_HWID_BITMASK by C code.
Hence we can just hardcode this in the assembler code, and remove the
variable, and thus also remove the need to write to this variable.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
If CONFIG_DEBUG_RODATA=y, the kernel crashes during system suspend:
Freezing user space processes ... (elapsed 0.004 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.002 seconds)
done.
PM: suspend of devices complete after 111.948 msecs
PM: late suspend of devices complete after 1.086 msecs
PM: noirq suspend of devices complete after 11.576 msecs
Disabling non-boot CPUs ...
Kernel panic - not syncing: Attempted to kill the idle task!
1014ec ---[ end Kernel panic - not syncing: Attempted to kill the idle task!
CPU0: stopping
This happens because the .text section is marked read-only, while the
arrays shmobile_smp_mpidr[], shmobile_smp_fn[], and shmobile_smp_arg[]
are being written to.
Fix this by moving these arrays from the .text to the .bss section.
This requires accessing them through PC-relative offsets.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Commit 0ca2894b5a ("ARM: shmobile: Use shared SCU SMP boot code on
r8a7779") obsoleted the r8a7779-specific SCU boot code, but forgot to
remove the setup of shmobile_boot_fn and shmobile_boot_arg, which is
overwritten by shmobile_smp_scu_prepare_cpus().
Note that shmobile_scu_base wasn't initialized at that point yet anyway.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
shmobile_scu_base is being written to, so it doesn't belong in the .text
section. Fix this by moving it from asm .text to C .bss, as it's no
longer used from asm code since commit 4f6da36f7e ("ARM: shmobile:
Remove old SCU boot code").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Looks like the HPET spec at intel.com got moved.
It isn't hard to find so drop the link, just mention
the revision assumed.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1455145462-3877-1-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
There will be data toggle error happen for full speed buld-out transfer.
The data toggle bit is saved in qh for non-control transfers, it is wrong
to check the qtd for that case.
Also fix one static analysis tool issue after fix the data toggle error.
John Youn:
* Added WARN() to warn on improper usage of the
dwc2_hcd_save_data_toggle() function.
Signed-off-by: Dyson Lee <dyson.lee@intel.com>
Signed-off-by: Tang, Jianqiang <jianqiang.tang@intel.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Fixes memory manipulation issues and makes Host DDMA bulk transfers
work.
dwc2_process_non_isoc_desc() must return non zero value ONLY when
failure happens in one of the queued descriptors. After receiving
non zero value the caller must stop processing of remaining
QTDs and their descriptors from chain.
Commit 26a19ea699 ("usb: dwc2: host: fix use of qtd after
free in desc dma mode") breaks non_isoc transaction completion logic
in Host DDMA mode. There were bugs before that, but after this patch
dwc2_process_non_isoc_desc() returns fail status even if descriptor
was processed normally. This causes break from loop which is processing
remaining descriptors assigned to QTD, which is not correct for QTDs
containing more than one descriptor.
Current dwc2 driver gathers queued BULK URBs until receiving URB
without URB_NO_INTERRUPT flag. Once getting it, SW creates
descriptor chain, stores it in qh structure and passes start
address to HW. Multiple URB data is contained in that chain.
Hence on getting error on descriptor after its processing by HW,
SW should go out of both loops(qh->qtd, qtd->descs) and report
the failure.
Fixes: 26a19ea699 ("usb: dwc2: host: fix use of qtd after free in desc dma mode")
Cc: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
The assignement of EP transfer resources was not handled properly in the
dwc3 driver. Commit aebda61871 ("usb: dwc3: Reset the transfer
resource index on SET_INTERFACE") previously fixed one aspect of this
where resources may be exhausted with multiple calls to SET_INTERFACE.
However, it introduced an issue where composite devices with multiple
interfaces can be assigned the same transfer resources for different
endpoints. This patch solves both issues.
The assignment of transfer resources cannot perfectly follow the data
book due to the fact that the controller driver does not have all
knowledge of the configuration in advance. It is given this information
piecemeal by the composite gadget framework after every
SET_CONFIGURATION and SET_INTERFACE. Trying to follow the databook
programming model in this scenario can cause errors. For two reasons:
1) The databook says to do DEPSTARTCFG for every SET_CONFIGURATION and
SET_INTERFACE (8.1.5). This is incorrect in the scenario of multiple
interfaces.
2) The databook does not mention doing more DEPXFERCFG for new endpoint
on alt setting (8.1.6).
The following simplified method is used instead:
All hardware endpoints can be assigned a transfer resource and this
setting will stay persistent until either a core reset or hibernation.
So whenever we do a DEPSTARTCFG(0) we can go ahead and do DEPXFERCFG for
every hardware endpoint as well. We are guaranteed that there are as
many transfer resources as endpoints.
This patch triggers off of the calling dwc3_gadget_start_config() for
EP0-out, which always happens first, and which should only happen in one
of the above conditions.
Fixes: aebda61871 ("usb: dwc3: Reset the transfer resource index on SET_INTERFACE")
Cc: <stable@vger.kernel.org> # v3.2+
Reported-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Fixes an issue found on rockchip rk3036 and rk3188 SOC platforms. For
some reason, the existing msleep(25) is not enough after the force mode.
The following patch was reported to fix the issue.
This does increase the probe delay again slightly, but not up to the
level it was before the original series of patches that this fixes. It
does not cause any other issues when tested on Synopsys HAPS and Altera
socfpga platforms.
Need to revisit this series next release to see if we can address these
issues without having an unconditional delay.
Fixes: 09c96980dc ("usb: dwc2: Add functions to set and clear force mode")
Reported-by: Caesar Wang <caesar.upstream@gmail.com>
Reported-by: Michael Niewoehner <linux@mniewoehner.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Caesar Wang <caesar.upstream@gmail.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Commit ca369d51b ("sd: Fix device-imposed transfer length limits")
introduced a new queue limit max_dev_sectors which limits the maximum
sectors for requests. The default value leads to small dasd requests
and therefor to a performance drop.
Set the max_dev_sectors value to the same value as the max_hw_sectors
to use the maximum available request size for DASD devices.
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Data corruption issues were observed in tests which initiated
a system crash/reset while accessing BTT devices. This problem
is reproducible.
The BTT driver calls pmem_rw_bytes() to update data in pmem
devices. This interface calls __copy_user_nocache(), which
uses non-temporal stores so that the stores to pmem are
persistent.
__copy_user_nocache() uses non-temporal stores when a request
size is 8 bytes or larger (and is aligned by 8 bytes). The
BTT driver updates the BTT map table, which entry size is
4 bytes. Therefore, updates to the map table entries remain
cached, and are not written to pmem after a crash.
Change __copy_user_nocache() to use non-temporal store when
a request size is 4 bytes. The change extends the current
byte-copy path for a less-than-8-bytes request, and does not
add any overhead to the regular path.
Reported-and-tested-by: Micah Parrish <micah.parrish@hpe.com>
Reported-and-tested-by: Brian Boylston <brian.boylston@hpe.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: <stable@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: linux-nvdimm@lists.01.org
Link: http://lkml.kernel.org/r/1455225857-12039-3-git-send-email-toshi.kani@hpe.com
[ Small readability edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
When fixing the DAT off bug ("s390: fix DAT off memory access, e.g.
on kdump") both Christian and I missed that we can save an additional
stnsm instruction.
This saves us a couple of cycles which could improve the speed of
memcpy_real.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
In the error path of amd_uncore_cpu_up_prepare() the newly allocated uncore
struct is freed, but the percpu pointer still references it. Set it to NULL.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1602162302170.19512@nanos
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The qxl_gem_prime_mmap() function returns ENOSYS instead of -ENOSYS
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
In the display resume path, move the calls to drm_vblank_on()
after the point when the display engine is running again.
Since changes were made to drm_update_vblank_count() in Linux 4.4+
to emulate hw vblank counters via vblank timestamping, the function
drm_vblank_on() now needs working high precision vblank timestamping
and therefore working scanout position queries at time of call.
These don't work before the display engine gets restarted, causing
miscalculation of vblank counter increments and thereby large forward
jumps in vblank count at display resume. These jumps can cause client
hangs on resume, or desktop hangs in the case of composited desktops.
Fix this Linux 4.4 regression by reordering calls accordingly.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: <stable@vger.kernel.org> # 4.4+
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: ville.syrjala@linux.intel.com
Cc: daniel.vetter@ffwll.ch
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Linus Torvalds