Commit 21e3d6c8 authored Sep 03, 2019 by Oliver Neukum Committed by Martin K. Petersen Sep 30, 2019

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>

parent 0aabb6b6

drivers/scsi/sd.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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;

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