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authorChristoph Hellwig <hch@lst.de>2014-11-03 19:36:40 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-21 09:22:53 -0800
commit945f341afb991b94fce08f633353efa0c623f719 (patch)
tree4af9d0dd250d82841fb3df0446b9df990199e675 /drivers/scsi
parent32049712c4d803139fecf7a59cfa3e24c8456d03 (diff)
downloadlinux-linaro-stable-945f341afb991b94fce08f633353efa0c623f719.tar.gz
scsi: only re-lock door after EH on devices that were reset
commit 48379270fe6808cf4612ee094adc8da2b7a83baa upstream. 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. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/scsi')
-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 f43de1e56420..3668b1b23b5a 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1689,8 +1689,10 @@ 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;
+ }
}
/*