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authorChristoph Hellwig <hch@lst.de>2014-11-03 19:36:40 +0100
committerChristoph Hellwig <hch@lst.de>2014-11-10 15:23:18 +0100
commit48379270fe6808cf4612ee094adc8da2b7a83baa (patch)
tree852495622d2f422c127b88ec30a5391d7f8cb955 /drivers/scsi/scsi_error.c
parent206c5f60a3d902bc4b56dab2de3e88de5eb06108 (diff)
scsi: only re-lock door after EH on devices that were reset
Setups that use the blk-mq I/O path can lock up if a host with a single device that has its door locked enters EH. Make sure to only send the command to re-lock the door to devices that actually were reset and thus might have lost their state. Otherwise the EH code might be get blocked on blk_get_request as all requests for non-reset devices might be in use. Cc: stable@vger.kernel.org Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Meelis Roos <meelis.roos@ut.ee> Tested-by: Meelis Roos <meelis.roos@ut.ee> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_error.c')
-rw-r--r--drivers/scsi/scsi_error.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 9a6f8468225f..c21e53071600 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -2001,8 +2001,10 @@ static void scsi_restart_operations(struct Scsi_Host *shost)
* is no point trying to lock the door of an off-line device.
*/
shost_for_each_device(sdev, shost) {
- if (scsi_device_online(sdev) && sdev->locked)
+ if (scsi_device_online(sdev) && sdev->was_reset && sdev->locked) {
scsi_eh_lock_door(sdev);
+ sdev->was_reset = 0;
+ }
}
/*