Commit Graph

949689 Commits

Author SHA1 Message Date
Linus Torvalds d6af633056 Devicetree fixes for v5.9, take 2:
- Restore range parsing error check
 
 - Workaround PCI range parsing with missing 'device_type' now required
 
 - Correct description of 'phy-connection-type'
 
 - Fix erroneous matching on 'snps,dw-pcie' by 'intel,lgm-pcie' schema
 
 - A couple of grammar and whitespace fixes
 
 - Update Shawn Guo's email
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Merge tag 'devicetree-fixes-for-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:
 "Another set of DT fixes:

   - restore range parsing error check

   - workaround PCI range parsing with missing 'device_type' now
     required

   - correct description of 'phy-connection-type'

   - fix erroneous matching on 'snps,dw-pcie' by 'intel,lgm-pcie' schema

   - a couple of grammar and whitespace fixes

   - update Shawn Guo's email"

* tag 'devicetree-fixes-for-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: vendor-prefixes: Remove trailing whitespace
  dt-bindings: net: correct description of phy-connection-type
  dt-bindings: PCI: intel,lgm-pcie: Fix matching on all snps,dw-pcie instances
  of: address: Work around missing device_type property in pcie nodes
  dt: writing-schema: Miscellaneous grammar fixes
  dt-bindings: Use Shawn Guo's preferred e-mail for i.MX bindings
  of/address: check for invalid range.cpu_addr
2020-08-22 09:31:11 -07:00
Ofir Bitton 5aba368893 habanalabs: correctly report inbound pci region cfg error
During inbound iATU configuration we can get errors while
configuring PCI registers, there is a certain scenario in which these
errors are not reflected and driver is loaded with wrong configuration.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:58 +03:00
Ofir Bitton 0839152f8c habanalabs: check correct vmalloc return code
vmalloc can return different return code than NULL and a valid
pointer. We must validate it in order to dereference a non valid
pointer.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:58 +03:00
Ofir Bitton bce382a8bb habanalabs: validate FW file size
We must validate FW size in order not to corrupt memory in case
a malicious FW file will be present in system.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:58 +03:00
Colin Ian King 804d057cfa habanalabs: fix incorrect check on failed workqueue create
The null check on a failed workqueue create is currently null checking
hdev->cq_wq rather than the pointer hdev->cq_wq[i] and so the test
will never be true on a failed workqueue create. Fix this by checking
hdev->cq_wq[i].

Addresses-Coverity: ("Dereference before null check")
Fixes: 5574cb2194 ("habanalabs: Assign each CQ with its own work queue")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:58 +03:00
Oded Gabbay 58361aae4b habanalabs: set max power according to card type
In Gaudi, the default max power setting is different between PCI and PMC
cards. Therefore, the driver need to set the default after knowing what is
the card type.

The current code has a bug where it limits the maximum power of the PMC
card to 200W after a reset occurs.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Ofir Bitton 36545279f0 habanalabs: proper handling of alloc size in coresight
Allocation size can go up to 64bit but truncated to 32bit,
we should make sure it is not truncated and validate no address
overflow.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Ofir Bitton f44d23b909 habanalabs: set clock gating according to mask
Once clock gating is set we enable clock gating according to mask,
we should also disable clock gating according to relevant bits.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Ofir Bitton 1cff119740 habanalabs: verify user input in cs_ioctl_signal_wait
User input must be validated before using it to
access internal structures.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Dan Carpenter b0353540ff habanalabs: Fix a loop in gaudi_extract_ecc_info()
The condition was reversed.  It should have been less than instead of
greater than.  The result is that we never enter the loop.

Fixes: fcc6a4e606 ("habanalabs: Extract ECC information from FW")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Dan Carpenter eeec23cd32 habanalabs: Fix memory corruption in debugfs
This has to be a long instead of a u32 because we write a long value.
On 64 bit systems, this will cause memory corruption.

Fixes: c216477363 ("habanalabs: add debugfs support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Ofir Bitton bc75be24fa habanalabs: validate packet id during CB parse
During command buffer parsing, driver extracts packet id
from user buffer. Driver must validate this packet id, since it is
being used in order to extract information from internal structures.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:57 +03:00
Ofir Bitton bf6d10963e habanalabs: Validate user address before mapping
User address must be validated before driver performs address map.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:56 +03:00
Ofir Bitton f1aae40e8d habanalabs: unmap PCI bars upon iATU failure
In case the driver fails to configure the PCI controller iATU, it needs to
unmap the PCI bars before exiting so if the driver is removed, the bars
won't be left mapped.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-08-22 12:47:56 +03:00
Rob Clark 43906812ea drm/msm: enable vblank during atomic commits
This has roughly the same effect as drm_atomic_helper_wait_for_vblanks(),
basically just ensuring that vblank accounting is enabled so that we get
valid timestamp/seqn on pageflip events.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
2020-08-21 22:30:17 -07:00
Hou Pu 2d62e6b038 null_blk: fix passing of REQ_FUA flag in null_handle_rq
REQ_FUA should be checked using rq->cmd_flags instead of req_op().

Fixes: deb78b419d ("nullb: emulate cache")
Signed-off-by: Hou Pu <houpu@bytedance.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Amit Engel 0d3b6a8d21 nvmet: Disable keep-alive timer when kato is cleared to 0h
Based on nvme spec, when keep alive timeout is set to zero
the keep-alive timer should be disabled.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Chao Leng 5eac5f3342 nvme: redirect commands on dying queue
If a command send through nvme-multipath failed on a dying queue, resend it
on another path.

Signed-off-by: Chao Leng <lengchao@huawei.com>
[hch: rebased on top of the completion refactoring]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Christoph Hellwig 1e41f3bd26 nvme: just check the status code type in nvme_is_path_error
Check the SCT sub-field for a path related status instead of enumerating
invididual status code.  As of NVMe 1.4 this adds "Internal Path Error"
and "Controller Pathing Error" to the list, but it also future proofs for
additional status codes added to the category.

Suggested-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Christoph Hellwig 5ddaabe8ed nvme: refactor command completion
Lift all the code to decide the dispostition of a completed command
from nvme_complete_rq and nvme_failover_req into a new helper, which
returns an emum of the potential actions.  nvme_complete_rq then
just switches on those and calls the proper helper for the action.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Christoph Hellwig 2eb81a3364 nvme: rename and document nvme_end_request
nvme_end_request is a bit misnamed, as it wraps around the
blk_mq_complete_* API.  It's semantics also are non-trivial, so give it
a more descriptive name and add a comment explaining the semantics.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:28 -06:00
Keith Busch c41ad98beb nvme: skip noiob for zoned devices
Zoned block devices reuse the chunk_sectors queue limit to define zone
boundaries. If a such a device happens to also report an optimal
boundary, do not use that to define the chunk_sectors as that may
intermittently interfere with io splitting and zone size queries.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Christoph Hellwig c61b82c7b7 nvme-pci: fix PRP pool size
All operations are based on the controller, not the host page size.
Switch the dma pool to use the controller page size as well to avoid
massive overallocations on large page size systems.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
John Garry 7442ddcedc nvme-pci: Use u32 for nvme_dev.q_depth and nvme_queue.q_depth
Recently nvme_dev.q_depth was changed from an int to u16 type.

This falls over for the queue depth calculation in nvme_pci_enable(),
where NVME_CAP_MQES(dev->ctrl.cap) + 1 may overflow as a u16, as
NVME_CAP_MQES() is a 16b number also. That happens for me, and this is the
result:

root@ubuntu:/home/john# [148.272996] Unable to handle kernel NULL pointer
dereference at virtual address 0000000000000010
Mem abort info:
ESR = 0x96000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
Data abort info:
ISV = 0, ISS = 0x00000004
CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=00000a27bf3c9000
[0000000000000010] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in: nvme nvme_core
CPU: 56 PID: 256 Comm: kworker/u195:0 Not tainted
5.8.0-next-20200812 #27
Hardware name: Huawei D06 /D06, BIOS Hisilicon D06 UEFI RC0 -
V1.16.01 03/15/2019
Workqueue: nvme-reset-wq nvme_reset_work [nvme]
pstate: 80c00009 (Nzcv daif +PAN +UAO BTYPE=--)
pc : __sg_alloc_table_from_pages+0xec/0x238
lr : __sg_alloc_table_from_pages+0xc8/0x238
sp : ffff800013ccbad0
x29: ffff800013ccbad0 x28: ffff0a27b3d380a8
x27: 0000000000000000 x26: 0000000000002dc2
x25: 0000000000000dc0 x24: 0000000000000000
x23: 0000000000000000 x22: ffff800013ccbbe8
x21: 0000000000000010 x20: 0000000000000000
x19: 00000000fffff000 x18: ffffffffffffffff
x17: 00000000000000c0 x16: fffffe289eaf6380
x15: ffff800011b59948 x14: ffff002bc8fe98f8
x13: ff00000000000000 x12: ffff8000114ca000
x11: 0000000000000000 x10: ffffffffffffffff
x9 : ffffffffffffffc0 x8 : ffff0a27b5f9b6a0
x7 : 0000000000000000 x6 : 0000000000000001
x5 : ffff0a27b5f9b680 x4 : 0000000000000000
x3 : ffff0a27b5f9b680 x2 : 0000000000000000
 x1 : 0000000000000001 x0 : 0000000000000000
 Call trace:
__sg_alloc_table_from_pages+0xec/0x238
sg_alloc_table_from_pages+0x18/0x28
iommu_dma_alloc+0x474/0x678
dma_alloc_attrs+0xd8/0xf0
nvme_alloc_queue+0x114/0x160 [nvme]
nvme_reset_work+0xb34/0x14b4 [nvme]
process_one_work+0x1e8/0x360
worker_thread+0x44/0x478
kthread+0x150/0x158
ret_from_fork+0x10/0x34
 Code: f94002c3 6b01017f 540007c2 11000486 (f8645aa5)
---[ end trace 89bb2b72d59bf925 ]---

Fix by making onto a u32.

Also use u32 for nvme_dev.q_depth, as we assign this value from
nvme_dev.q_depth, and nvme_dev.q_depth will possibly hold 65536 - this
avoids the same crash as above.

Fixes: 61f3b89630 ("nvme-pci: use unsigned for io queue depth")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Logan Gunthorpe ecbcdf0c81 nvme: Use spin_lock_irq() when taking the ctrl->lock
When locking the ctrl->lock spinlock IRQs need to be disabled to avoid a
dead lock. The new spin_lock() calls recently added produce the
following lockdep warning when running the blktest nvme/003:

    ================================
    WARNING: inconsistent lock state
    --------------------------------
    inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
    ksoftirqd/2/22 [HC0[0]:SC1[1]:HE0:SE0] takes:
    ffff888276a8c4c0 (&ctrl->lock){+.?.}-{2:2}, at: nvme_keep_alive_end_io+0x50/0xc0
    {SOFTIRQ-ON-W} state was registered at:
      lock_acquire+0x164/0x500
      _raw_spin_lock+0x28/0x40
      nvme_get_effects_log+0x37/0x1c0
      nvme_init_identify+0x9e4/0x14f0
      nvme_reset_work+0xadd/0x2360
      process_one_work+0x66b/0xb70
      worker_thread+0x6e/0x6c0
      kthread+0x1e7/0x210
      ret_from_fork+0x22/0x30
    irq event stamp: 1449221
    hardirqs last  enabled at (1449220): [<ffffffff81c58e69>] ktime_get+0xf9/0x140
    hardirqs last disabled at (1449221): [<ffffffff83129665>] _raw_spin_lock_irqsave+0x25/0x60
    softirqs last  enabled at (1449210): [<ffffffff83400447>] __do_softirq+0x447/0x595
    softirqs last disabled at (1449215): [<ffffffff81b489b5>] run_ksoftirqd+0x35/0x50

    other info that might help us debug this:
     Possible unsafe locking scenario:

           CPU0
           ----
      lock(&ctrl->lock);
      <Interrupt>
        lock(&ctrl->lock);

     *** DEADLOCK ***

    no locks held by ksoftirqd/2/22.

    stack backtrace:
    CPU: 2 PID: 22 Comm: ksoftirqd/2 Not tainted 5.8.0-rc4-eid-vmlocalyes-dbg-00157-g7236657c6b3a #1450
    Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.12.0-1 04/01/2014
    Call Trace:
     dump_stack+0xc8/0x11a
     print_usage_bug.cold.63+0x235/0x23e
     mark_lock+0xa9c/0xcf0
     __lock_acquire+0xd9a/0x2b50
     lock_acquire+0x164/0x500
     _raw_spin_lock_irqsave+0x40/0x60
     nvme_keep_alive_end_io+0x50/0xc0
     blk_mq_end_request+0x158/0x210
     nvme_complete_rq+0x146/0x500
     nvme_loop_complete_rq+0x26/0x30 [nvme_loop]
     blk_done_softirq+0x187/0x1e0
     __do_softirq+0x118/0x595
     run_ksoftirqd+0x35/0x50
     smpboot_thread_fn+0x1d3/0x310
     kthread+0x1e7/0x210
     ret_from_fork+0x22/0x30

Fixes: be93e87e78 ("nvme: support for multiple Command Sets Supported and Effects log pages")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Chaitanya Kulkarni 7ee51cf60a nvmet: call blk_mq_free_request() directly
Instead of calling blk_put_request() which calls blk_mq_free_request(),
call blk_mq_free_request() directly for NVMeOF passthru. This is to
mainly avoid an extra function call in the completion path
nvmet_passthru_req_done().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Chaitanya Kulkarni a2138fd494 nvmet: fix oops in pt cmd execution
In the existing NVMeOF Passthru core command handling on failure of
nvme_alloc_request() it errors out with rq value set to NULL. In the
error handling path it calls blk_put_request() without checking if
rq is set to NULL or not which produces following Oops:-

[ 1457.346861] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1457.347838] #PF: supervisor read access in kernel mode
[ 1457.348464] #PF: error_code(0x0000) - not-present page
[ 1457.349085] PGD 0 P4D 0
[ 1457.349402] Oops: 0000 [#1] SMP NOPTI
[ 1457.349851] CPU: 18 PID: 10782 Comm: kworker/18:2 Tainted: G           OE     5.8.0-rc4nvme-5.9+ #35
[ 1457.350951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e3214
[ 1457.352347] Workqueue: events nvme_loop_execute_work [nvme_loop]
[ 1457.353062] RIP: 0010:blk_mq_free_request+0xe/0x110
[ 1457.353651] Code: 3f ff ff ff 83 f8 01 75 0d 4c 89 e7 e8 1b db ff ff e9 2d ff ff ff 0f 0b eb ef 66 8
[ 1457.355975] RSP: 0018:ffffc900035b7de0 EFLAGS: 00010282
[ 1457.356636] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
[ 1457.357526] RDX: ffffffffa060bd05 RSI: 0000000000000000 RDI: 0000000000000000
[ 1457.358416] RBP: 0000000000000037 R08: 0000000000000000 R09: 0000000000000000
[ 1457.359317] R10: 0000000000000000 R11: 000000000000006d R12: 0000000000000000
[ 1457.360424] R13: ffff8887ffa68600 R14: 0000000000000000 R15: ffff8888150564c8
[ 1457.361322] FS:  0000000000000000(0000) GS:ffff888814600000(0000) knlGS:0000000000000000
[ 1457.362337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.363058] CR2: 0000000000000000 CR3: 000000081c0ac000 CR4: 00000000003406e0
[ 1457.363973] Call Trace:
[ 1457.364296]  nvmet_passthru_execute_cmd+0x150/0x2c0 [nvmet]
[ 1457.364990]  process_one_work+0x24e/0x5a0
[ 1457.365493]  ? __schedule+0x353/0x840
[ 1457.365957]  worker_thread+0x3c/0x380
[ 1457.366426]  ? process_one_work+0x5a0/0x5a0
[ 1457.366948]  kthread+0x135/0x150
[ 1457.367362]  ? kthread_create_on_node+0x60/0x60
[ 1457.367934]  ret_from_fork+0x22/0x30
[ 1457.368388] Modules linked in: nvme_loop(OE) nvmet(OE) nvme_fabrics(OE) null_blk nvme(OE) nvme_corer
[ 1457.368414]  ata_piix crc32c_intel virtio_pci libata virtio_ring serio_raw t10_pi virtio floppy dm_]
[ 1457.380849] CR2: 0000000000000000
[ 1457.381288] ---[ end trace c6cab61bfd1f68fd ]---
[ 1457.381861] RIP: 0010:blk_mq_free_request+0xe/0x110
[ 1457.382469] Code: 3f ff ff ff 83 f8 01 75 0d 4c 89 e7 e8 1b db ff ff e9 2d ff ff ff 0f 0b eb ef 66 8
[ 1457.384749] RSP: 0018:ffffc900035b7de0 EFLAGS: 00010282
[ 1457.385393] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
[ 1457.386264] RDX: ffffffffa060bd05 RSI: 0000000000000000 RDI: 0000000000000000
[ 1457.387142] RBP: 0000000000000037 R08: 0000000000000000 R09: 0000000000000000
[ 1457.388029] R10: 0000000000000000 R11: 000000000000006d R12: 0000000000000000
[ 1457.388914] R13: ffff8887ffa68600 R14: 0000000000000000 R15: ffff8888150564c8
[ 1457.389798] FS:  0000000000000000(0000) GS:ffff888814600000(0000) knlGS:0000000000000000
[ 1457.390796] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.391508] CR2: 0000000000000000 CR3: 000000081c0ac000 CR4: 00000000003406e0
[ 1457.392525] Kernel panic - not syncing: Fatal exception
[ 1457.394138] Kernel Offset: disabled
[ 1457.394677] ---[ end Kernel panic - not syncing: Fatal exception ]---

We fix this Oops by adding a new goto label out_put_req and reordering
the blk_put_request call to avoid calling blk_put_request() with rq
value is set to NULL. Here we also update the rest of the code
accordingly.

Fixes: 06b7164dfdc0 ("nvmet: add passthru code to process commands")
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Chaitanya Kulkarni 4db69a3d7c nvmet: add ns tear down label for pt-cmd handling
In the current implementation before submitting the passthru cmd we
may come across error e.g. getting ns from passthru controller,
allocating a request from passthru controller, etc. For all the failure
cases it only uses single goto label fail_out.

In the target code, we follow the pattern to have a separate label for
each error out the case when setting up multiple things before the actual
action.

This patch follows the same pattern and renames generic fail_out label
to out_put_ns and updates the error out cases in the
nvmet_passthru_execute_cmd() where it is needed.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Martin Wilck e398863b75 nvme: multipath: round-robin: eliminate "fallback" variable
If we find an optimized path, we quit the loop immediately. Thus we can use
just one variable for the next path, slighly simplifying the code.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Martin Wilck 93eb0381e1 nvme: multipath: round-robin: fix single non-optimized path case
If there's only one usable, non-optimized path, nvme_round_robin_path()
returns NULL, which is wrong. Fix it by falling back to "old", like in
the single optimized path case. Also, if the active path isn't changed,
there's no need to re-assign the pointer.

Fixes: 3f6e3246db ("nvme-multipath: fix logic for non-optimized paths")
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin George <marting@netapp.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Tianjia Zhang f34448cd0d nvme-fc: Fix wrong return value in __nvme_fc_init_request()
On an error exit path, a negative error code should be returned
instead of a positive return value.

Fixes: e399441de9 ("nvme-fabrics: Add host support for FC transport")
Cc: James Smart <jsmart2021@gmail.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Logan Gunthorpe 0ceeab96ba nvmet-passthru: Reject commands with non-sgl flags set
Any command with a non-SGL flag set (like fuse flags) should be
rejected.

Fixes: c1fef73f79 ("nvmet: add passthru code to process commands")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Sagi Grimberg 382fee1a8b nvmet: fix a memory leak
We forgot to free new_model_number

Fixes: 013b7ebe5a ("nvmet: make ctrl model configurable")
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Yufen Yu 27029b4b18 blkcg: fix memleak for iolatency
Normally, blkcg_iolatency_exit() will free related memory in iolatency
when cleanup queue. But if blk_throtl_init() return error and queue init
fail, blkcg_iolatency_exit() will not do that for us. Then it cause
memory leak.

Fixes: d706751215 ("block: introduce blk-iolatency io controller")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:14:27 -06:00
Geert Uytterhoeven 0c8b9c3540 MAINTAINERS: Add missing header files to BLOCK LAYER section
The various <linux/blk*.h> header files are part of the Block Layer.
Add them to the corresponding section in the MAINTAINERS file, so
scripts/get_maintainer.pl will pick them up.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:09:29 -06:00
Keith Busch e4b469c66f block: fix get_max_io_size()
A previous commit aligning splits to physical block sizes inadvertently
modified one return case such that that it now returns 0 length splits
when the number of sectors doesn't exceed the physical offset. This
later hits a BUG in bio_split(). Restore the previous working behavior.

Fixes: 9cc5169cd4 ("block: Improve physical block alignment of split bios")
Reported-by: Eric Deal <eric.deal@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:09:22 -06:00
Ming Lei db03f88fae blk-mq: insert request not through ->queue_rq into sw/scheduler queue
c616cbee97 ("blk-mq: punt failed direct issue to dispatch list") supposed
to add request which has been through ->queue_rq() to the hw queue dispatch
list, however it adds request running out of budget or driver tag to hw queue
too. This way basically bypasses request merge, and causes too many request
dispatched to LLD, and system% is unnecessary increased.

Fixes this issue by adding request not through ->queue_rq into sw/scheduler
queue, and this way is safe because no ->queue_rq is called on this request
yet.

High %system can be observed on Azure storvsc device, and even soft lock
is observed. This patch reduces %system during heavy sequential IO,
meantime decreases soft lockup risk.

Fixes: c616cbee97 ("blk-mq: punt failed direct issue to dispatch list")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:09:22 -06:00
Nathan Chancellor 17bc10300c block/rnbd: Ensure err is always initialized in process_rdma
Clang warns:

drivers/block/rnbd/rnbd-srv.c:150:6: warning: variable 'err' is used
uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
        if (IS_ERR(bio)) {
            ^~~~~~~~~~~
drivers/block/rnbd/rnbd-srv.c:177:9: note: uninitialized use occurs here
        return err;
               ^~~
drivers/block/rnbd/rnbd-srv.c:150:2: note: remove the 'if' if its
condition is always false
        if (IS_ERR(bio)) {
        ^~~~~~~~~~~~~~~~~~
drivers/block/rnbd/rnbd-srv.c:126:9: note: initialize the variable 'err'
to silence this warning
        int err;
               ^
                = 0
1 warning generated.

err is indeed uninitialized when this statement is taken. Ensure that it
is assigned the error value of bio before jumping to the error handling
label.

Fixes: 735d77d4fd ("rnbd: remove rnbd_dev_submit_io")
Reported-by: Brooke Basile <brookebasile@gmail.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1134
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-21 17:09:11 -06:00
Geert Uytterhoeven 5cd841d267 dt-bindings: vendor-prefixes: Remove trailing whitespace
Fixes: f516fb704d ("dt-bindings: Whitespace clean-ups in schema files")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200819092058.1526-1-geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>
2020-08-21 16:27:57 -06:00
Will Deacon b5331379bc KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set
When an MMU notifier call results in unmapping a range that spans multiple
PGDs, we end up calling into cond_resched_lock() when crossing a PGD boundary,
since this avoids running into RCU stalls during VM teardown. Unfortunately,
if the VM is destroyed as a result of OOM, then blocking is not permitted
and the call to the scheduler triggers the following BUG():

 | BUG: sleeping function called from invalid context at arch/arm64/kvm/mmu.c:394
 | in_atomic(): 1, irqs_disabled(): 0, non_block: 1, pid: 36, name: oom_reaper
 | INFO: lockdep is turned off.
 | CPU: 3 PID: 36 Comm: oom_reaper Not tainted 5.8.0 #1
 | Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
 | Call trace:
 |  dump_backtrace+0x0/0x284
 |  show_stack+0x1c/0x28
 |  dump_stack+0xf0/0x1a4
 |  ___might_sleep+0x2bc/0x2cc
 |  unmap_stage2_range+0x160/0x1ac
 |  kvm_unmap_hva_range+0x1a0/0x1c8
 |  kvm_mmu_notifier_invalidate_range_start+0x8c/0xf8
 |  __mmu_notifier_invalidate_range_start+0x218/0x31c
 |  mmu_notifier_invalidate_range_start_nonblock+0x78/0xb0
 |  __oom_reap_task_mm+0x128/0x268
 |  oom_reap_task+0xac/0x298
 |  oom_reaper+0x178/0x17c
 |  kthread+0x1e4/0x1fc
 |  ret_from_fork+0x10/0x30

Use the new 'flags' argument to kvm_unmap_hva_range() to ensure that we
only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is set in the notifier
flags.

Cc: <stable@vger.kernel.org>
Fixes: 8b3405e345 ("kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd")
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-3-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-08-21 18:06:43 -04:00
Will Deacon fdfe7cbd58 KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
The 'flags' field of 'struct mmu_notifier_range' is used to indicate
whether invalidate_range_{start,end}() are permitted to block. In the
case of kvm_mmu_notifier_invalidate_range_start(), this field is not
forwarded on to the architecture-specific implementation of
kvm_unmap_hva_range() and therefore the backend cannot sensibly decide
whether or not to block.

Add an extra 'flags' parameter to kvm_unmap_hva_range() so that
architectures are aware as to whether or not they are permitted to block.

Cc: <stable@vger.kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-2-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-08-21 18:03:47 -04:00
Madalin Bucur 5f53584ce9 dt-bindings: net: correct description of phy-connection-type
The phy-connection-type parameter is described in ePAPR 1.1:

Specifies interface type between the Ethernet device and a physical
layer (PHY) device. The value of this property is specific to the
implementation.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Link: https://lore.kernel.org/r/1597917724-11127-1-git-send-email-madalin.bucur@oss.nxp.com
Signed-off-by: Rob Herring <robh@kernel.org>
2020-08-21 16:01:50 -06:00
Linus Torvalds f873db9acd io_uring-5.9-2020-08-21
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Merge tag 'io_uring-5.9-2020-08-21' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - Make sure the head link cancelation includes async work

 - Get rid of kiocb_wait_page_queue_init(), makes no sense to have it as
   a separate function since you moved it into io_uring itself

 - io_import_iovec cleanups (Pavel, me)

 - Use system_unbound_wq for ring exit work, to avoid spawning tons of
   these if we have tons of rings exiting at the same time

 - Fix req->flags overflow flag manipulation (Pavel)

* tag 'io_uring-5.9-2020-08-21' of git://git.kernel.dk/linux-block:
  io_uring: kill extra iovec=NULL in import_iovec()
  io_uring: comment on kfree(iovec) checks
  io_uring: fix racy req->flags modification
  io_uring: use system_unbound_wq for ring exit work
  io_uring: cleanup io_import_iovec() of pre-mapped request
  io_uring: get rid of kiocb_wait_page_queue_init()
  io_uring: find and cancel head link async work on files exit
2020-08-21 14:59:16 -07:00
Rob Herring a326462cba dt-bindings: PCI: intel,lgm-pcie: Fix matching on all snps,dw-pcie instances
The intel,lgm-pcie binding is matching on all snps,dw-pcie instances
which is wrong. Add a custom 'select' entry to fix this.

Fixes: e54ea45a49 ("dt-bindings: PCI: intel: Add YAML schemas for the PCIe RC controller")
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Reviewed-by: Dilip Kota <eswara.kota@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-08-21 15:51:01 -06:00
Linus Torvalds 349111f050 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "11 patches.

  Subsystems affected by this: misc, mm/hugetlb, mm/vmalloc, mm/misc,
  romfs, relay, uprobes, squashfs, mm/cma, mm/pagealloc"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, page_alloc: fix core hung in free_pcppages_bulk()
  mm: include CMA pages in lowmem_reserve at boot
  squashfs: avoid bio_alloc() failure with 1Mbyte blocks
  uprobes: __replace_page() avoid BUG in munlock_vma_page()
  kernel/relay.c: fix memleak on destroy relay channel
  romfs: fix uninitialized memory leak in romfs_dev_read()
  mm/rodata_test.c: fix missing function declaration
  mm/vunmap: add cond_resched() in vunmap_pmd_range
  khugepaged: adjust VM_BUG_ON_MM() in __khugepaged_enter()
  hugetlb_cgroup: convert comma to semicolon
  mailmap: add Andi Kleen
2020-08-21 14:44:48 -07:00
David S. Miller 4af7b32f84 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Alexei Starovoitov says:

====================
pull-request: bpf 2020-08-21

The following pull-request contains BPF updates for your *net* tree.

We've added 11 non-merge commits during the last 5 day(s) which contain
a total of 12 files changed, 78 insertions(+), 24 deletions(-).

The main changes are:

1) three fixes in BPF task iterator logic, from Yonghong.

2) fix for compressed dwarf sections in vmlinux, from Jiri.

3) fix xdp attach regression, from Andrii.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-21 12:54:50 -07:00
Linus Torvalds f22c5579a7 RISC-V Fixes for 5.9-rc2
* The CLINT driver has been split in two: one to handle the M-mode CLINT
   (memory mapped and used on NOMMU systems) and one to handle the S-mode CLINT
   (via SBI).
 * The addition of SiFive's drivers to rv32_defconfig
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Merge tag 'riscv-for-linus-5.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - The CLINT driver has been split in two: one to handle the M-mode
   CLINT (memory mapped and used on NOMMU systems) and one to handle the
   S-mode CLINT (via SBI).

 - The addition of SiFive's drivers to rv32_defconfig

* tag 'riscv-for-linus-5.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Add SiFive drivers to rv32_defconfig
  dt-bindings: timer: Add CLINT bindings
  RISC-V: Remove CLINT related code from timer and arch
  clocksource/drivers: Add CLINT timer driver
  RISC-V: Add mechanism to provide custom IPI operations
2020-08-21 12:32:42 -07:00
Linus Torvalds c0a4f5b354 xen: branch for v5.9-rc2
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Merge tag 'for-linus-5.9-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "One build fix and a minor fix for suppressing a useless warning when
  booting a Xen dom0 via UEFI"

* tag 'for-linus-5.9-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  Fix build error when CONFIG_ACPI is not set/enabled:
  efi: avoid error message when booting under Xen
2020-08-21 12:28:33 -07:00
Linus Torvalds 985c788b6d Power management fixes for 5.9-rc2
- Fix re-enabling of resources in dev_pm_opp_set_rate() (Rajendra
    Nayak).
 
  - Fix OPP table reference counting in error paths (Stephen Boyd).
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Merge tag 'pm-5.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a few issues in the operating performance points (OPP)
  framework.

  Specifics:

   - Fix re-enabling of resources in dev_pm_opp_set_rate() (Rajendra
     Nayak)

   - Fix OPP table reference counting in error paths (Stephen Boyd)"

* tag 'pm-5.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  opp: Enable resources again if they were disabled earlier
  opp: Put opp table in dev_pm_opp_set_rate() if _set_opp_bw() fails
  opp: Put opp table in dev_pm_opp_set_rate() for empty tables
2020-08-21 12:26:58 -07:00
Tobias Klauser b16fc097bc bpf: Fix two typos in uapi/linux/bpf.h
Also remove trailing whitespaces in bpf_skb_get_tunnel_key example code.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200821133642.18870-1-tklauser@distanz.ch
2020-08-21 12:26:17 -07:00