diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-11-03 19:36:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-21 09:23:03 -0800 |
| commit | 1c753164d26bfffa90d6b852d0904020776457cf (patch) | |
| tree | 595c829846ecf46f54f6b8f7afd79c924317da85 /drivers/scsi | |
| parent | a1dd586647f122eec80dee85d3f6cb6685c8c7e8 (diff) | |
| download | lwn-1c753164d26bfffa90d6b852d0904020776457cf.tar.gz lwn-1c753164d26bfffa90d6b852d0904020776457cf.zip | |
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.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index edb4d46fa874..96b6664bb1cf 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1984,8 +1984,10 @@ 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; + } } /* |