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  1. 27 2月, 2016 2 次提交
  3. 12 2月, 2016 1 次提交
    • J
      scsi: fix soft lockup in scsi_remove_target() on module removal · 90a88d6e
      由 James Bottomley 提交于 
      This softlockup is currently happening:

[  444.088002] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:1:29]
[  444.088002] Modules linked in: lpfc(-) qla2x00tgt(O) qla2xxx_scst(O) scst_vdisk(O) scsi_transport_fc libcrc32c scst(O) dlm configfs nfsd lockd grace nfs_acl auth_rpcgss sunrpc ed
d snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device dm_mod iTCO_wdt snd_hda_codec_realtek snd_hda_codec_generic gpio_ich iTCO_vendor_support ppdev snd_hda_intel snd_hda_codec snd_hda
_core snd_hwdep tg3 snd_pcm snd_timer libphy lpc_ich parport_pc ptp acpi_cpufreq snd pps_core fjes parport i2c_i801 ehci_pci tpm_tis tpm sr_mod cdrom soundcore floppy hwmon sg 8250_
fintek pcspkr i915 drm_kms_helper uhci_hcd ehci_hcd drm fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit usbcore button video usb_common fan ata_generic ata_piix libata th
ermal
[  444.088002] CPU: 1 PID: 29 Comm: kworker/1:1 Tainted: G           O    4.4.0-rc5-2.g1e923a3-default #1
[  444.088002] Hardware name: FUJITSU SIEMENS ESPRIMO E           /D2164-A1, BIOS 5.00 R1.10.2164.A1               05/08/2006
[  444.088002] Workqueue: fc_wq_4 fc_rport_final_delete [scsi_transport_fc]
[  444.088002] task: f6266ec0 ti: f6268000 task.ti: f6268000
[  444.088002] EIP: 0060:[<c07e7044>] EFLAGS: 00000286 CPU: 1
[  444.088002] EIP is at _raw_spin_unlock_irqrestore+0x14/0x20
[  444.088002] EAX: 00000286 EBX: f20d3800 ECX: 00000002 EDX: 00000286
[  444.088002] ESI: f50ba800 EDI: f2146848 EBP: f6269ec8 ESP: f6269ec8
[  444.088002]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[  444.088002] CR0: 8005003b CR2: 08f96600 CR3: 363ae000 CR4: 000006d0
[  444.088002] Stack:
[  444.088002]  f6269eec c066b0f7 00000286 f2146848 f50ba808 f50ba800 f50ba800 f2146a90
[  444.088002]  f2146848 f6269f08 f8f0a4ed f3141000 f2146800 f2146a90 f619fa00 00000040
[  444.088002]  f6269f40 c026cb25 00000001 166c6392 00000061 f6757140 f6136340 00000004
[  444.088002] Call Trace:
[  444.088002]  [<c066b0f7>] scsi_remove_target+0x167/0x1c0
[  444.088002]  [<f8f0a4ed>] fc_rport_final_delete+0x9d/0x1e0 [scsi_transport_fc]
[  444.088002]  [<c026cb25>] process_one_work+0x155/0x3e0
[  444.088002]  [<c026cde7>] worker_thread+0x37/0x490
[  444.088002]  [<c027214b>] kthread+0x9b/0xb0
[  444.088002]  [<c07e72c1>] ret_from_kernel_thread+0x21/0x40

What appears to be happening is that something has pinned the target
so it can't go into STARGET_DEL via final release and the loop in
scsi_remove_target spins endlessly until that happens.

The fix for this soft lockup is to not keep looping over a device that
we've called remove on but which hasn't gone into DEL state.  This
patch will retain a simplistic memory of the last target and not keep
looping over it.
Reported-by: NSebastian Herbszt <herbszt@gmx.de>
Tested-by: NSebastian Herbszt <herbszt@gmx.de>
Fixes: 40998193
Cc: stable@vger.kernel.org
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
      90a88d6e
  5. 11 2月, 2016 1 次提交
  7. 10 2月, 2016 1 次提交
  9. 07 2月, 2016 2 次提交
  11. 05 2月, 2016 3 次提交
    • M
      block/sd: Return -EREMOTEIO when WRITE SAME and DISCARD are disabled · 0fb5b1fb
      由 Martin K. Petersen 提交于 
      When a storage device rejects a WRITE SAME command we will disable write
same functionality for the device and return -EREMOTEIO to the block
layer. -EREMOTEIO will in turn prevent DM from retrying the I/O and/or
failing the path.

Yiwen Jiang discovered a small race where WRITE SAME requests issued
simultaneously would cause -EIO to be returned. This happened because
any requests being prepared after WRITE SAME had been disabled for the
device caused us to return BLKPREP_KILL. The latter caused the block
layer to return -EIO upon completion.

To overcome this we introduce BLKPREP_INVALID which indicates that this
is an invalid request for the device. blk_peek_request() is modified to
return -EREMOTEIO in that case.
Reported-by: NYiwen Jiang <jiangyiwen@huawei.com>
Suggested-by: NMike Snitzer <snitzer@redhat.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Reviewed-by: NEwan Milne <emilne@redhat.com>
Reviewed-by: NYiwen Jiang <jiangyiwen@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
      0fb5b1fb
    • M
      SCSI: Add Marvell Console to VPD blacklist · 82c43310
      由 Mika Westerberg 提交于 
      I have a Marvell 88SE9230 SATA Controller that has some sort of
integrated console SCSI device attached to one of the ports.

  ata14: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  ata14.00: ATAPI: MARVELL VIRTUALL, 1.09, max UDMA/66
  ata14.00: configured for UDMA/66
  scsi 13:0:0:0: Processor         Marvell  Console 1.01 PQ: 0 ANSI: 5

Sending it VPD INQUIRY command seem to always fail with following error:

  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x40000001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 2 dma 16640 in
            Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 Emask 0x3 (HSM violation)
  ata14: hard resetting link

This has been minor annoyance (only error printed on dmesg) until commit
09e2b0b1 ("scsi: rescan VPD attributes") added call to scsi_attach_vpd()
in scsi_rescan_device(). The commit causes the system to splat out
following errors continuously without ever reaching the UI:

  ata14.00: configured for UDMA/66
  ata14: EH complete
  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x40000001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 6 dma 16640 in
            Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 Emask 0x3 (HSM violation)
  ata14: hard resetting link
  ata14: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  ata14.00: configured for UDMA/66
  ata14: EH complete
  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x40000001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 7 dma 16640 in
            Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 Emask 0x3 (HSM violation)

Without in-depth understanding of SCSI layer and the Marvell controller,
I suspect this happens because when the link goes down (because of an
error) we schedule scsi_rescan_device() which again fails to read VPD
data... ad infinitum.

Since VPD data cannot be read from the device anyway we prevent the SCSI
layer from even trying by blacklisting the device. This gets away the
error and the system starts up normally.

[mkp: Widened the match to all revisions of this device]

Cc: <stable@vger.kernel.org>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Reported-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: NAlexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
      82c43310
    • H
      scsi_dh_rdac: always retry MODE SELECT on command lock violation · d2d06d4f
      由 Hannes Reinecke 提交于 
      If MODE SELECT returns with sense '05/91/36' (command lock violation)
it should always be retried without counting the number of retries.
During an HBA upgrade or similar circumstances one might see a flood
of MODE SELECT command from various HBAs, which will easily trigger
the sense code and exceed the retry count.

Cc: <stable@vger.kernel.org>
Signed-off-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
      d2d06d4f
  13. 04 2月, 2016 1 次提交
    • K
      drivers/scsi/sg.c: mark VMA as VM_IO to prevent migration · 461c7fa1
      由 Kirill A. Shutemov 提交于 
      Reduced testcase:

    #include <fcntl.h>
    #include <unistd.h>
    #include <sys/mman.h>
    #include <numaif.h>

    #define SIZE 0x2000

    int main()
    {
        int fd;
        void *p;

        fd = open("/dev/sg0", O_RDWR);
        p = mmap(NULL, SIZE, PROT_EXEC, MAP_PRIVATE | MAP_LOCKED, fd, 0);
        mbind(p, SIZE, 0, NULL, 0, MPOL_MF_MOVE);
        return 0;
    }

We shouldn't try to migrate pages in sg VMA as we don't have a way to
update Sg_scatter_hold::pages accordingly from mm core.

Let's mark the VMA as VM_IO to indicate to mm core that the VMA is not
migratable.
Signed-off-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Acked-by: NVlastimil Babka <vbabka@suse.cz>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Shiraz Hashim <shashim@codeaurora.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: syzkaller <syzkaller@googlegroups.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      461c7fa1
  15. 30 1月, 2016 2 次提交
  17. 29 1月, 2016 2 次提交
  19. 27 1月, 2016 3 次提交
  21. 21 1月, 2016 3 次提交
  23. 20 1月, 2016 1 次提交
    • A
      scsi: qla2xxxx: avoid type mismatch in comparison · fab683eb
      由 Arnd Bergmann 提交于 
      A recent bug fix added code that does

        bool logged_out = (status & 0xFFFF);
        if (logged_out == CTIO_PORT_LOGGED_OUT)
		...

This looks wrong because we are comparing a boolean with an
integer constant, ang gcc warns about it accordingly:

drivers/scsi/qla2xxx/qla_target.c: In function 'qlt_do_ctio_completion':
drivers/scsi/qla2xxx/qla_target.c:3587:20: warning: comparison of constant '41' with boolean expression is always false [-Wbool-compare]
        (logged_out == CTIO_PORT_LOGGED_OUT) ?

The correct fix is presumably to make that variable an 'int'.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 71cdc079 ("qla2xxx: Delete session if initiator is gone from FW")
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      fab683eb
  25. 09 1月, 2016 8 次提交
  27. 08 1月, 2016 10 次提交