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scsi: sd: Ignore a failure to sync cache due to lack of authorization 

I've got a report about a UAS drive enclosure reporting back Sense: Logical
unit access not authorized if the drive it holds is password protected.
While the drive is obviously unusable in that state as a mass storage
device, it still exists as a sd device and when the system is asked to
perform a suspend of the drive, it will be sent a SYNCHRONIZE CACHE. If
that fails due to password protection, the error must be ignored.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20190903101840.16483-1-oneukum@suse.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Oliver Neukum 2019-09-03 12:18:39 +02:00 committed by Martin K. Petersen
parent 0aabb6b699
commit 21e3d6c811
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/sd.c
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@ -1655,7 +1655,8 @@ static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
/* we need to evaluate the error return */
if (scsi_sense_valid(sshdr) &&
(sshdr->asc == 0x3a || /* medium not present */
sshdr->asc == 0x20)) /* invalid command */
sshdr->asc == 0x20 || /* invalid command */
(sshdr->asc == 0x74 && sshdr->ascq == 0x71))) /* drive is password locked */
/* this is no error here */
return 0;