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SCSI fixes on 20171230 

Two simple fixes, both of which cause I/O hangs.  The storvsc one is
 from the hyper-v which can hang under certain hot add/remove
 conditions and the other is generally, where removing a target and a
 device in close proximity can result in the release method being
 executed twice (and subsequent list and other corruption and an
 eventual panic).
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two simple fixes, both of which cause I/O hangs.

  The storvsc one is from the hyper-v which can hang under certain hot
  add/remove conditions and the other is generally, where removing a
  target and a device in close proximity can result in the release
  method being executed twice (and subsequent list and other corruption
  and an eventual panic)"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error
  scsi: core: check for device state in __scsi_remove_target()
This commit is contained in:
Linus Torvalds 2017-12-30 14:31:30 -08:00
parent efdd17f895 d1b8b2391c
commit 71ee203389
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/scsi_sysfs.c
View File

@ -1415,7 +1415,10 @@ static void __scsi_remove_target(struct scsi_target *starget)
* check.
*/
if (sdev->channel != starget->channel ||
sdev->id != starget->id ||
sdev->id != starget->id)
continue;
if (sdev->sdev_state == SDEV_DEL ||
sdev->sdev_state == SDEV_CANCEL ||
!get_device(&sdev->sdev_gendev))
continue;
spin_unlock_irqrestore(shost->host_lock, flags);

3
drivers/scsi/storvsc_drv.c
View File

@ -953,10 +953,11 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb,
case TEST_UNIT_READY:
break;
default:
set_host_byte(scmnd, DID_TARGET_FAILURE);
set_host_byte(scmnd, DID_ERROR);
}
break;
case SRB_STATUS_INVALID_LUN:
set_host_byte(scmnd, DID_NO_CONNECT);
do_work = true;
process_err_fn = storvsc_remove_lun;
break;