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FROMLIST: sd: Retry START STOP UNIT commands

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During system resume, sd_start_stop_device() submits a START STOP UNIT
command to the SCSI device that is being resumed. That command is not
retried in case of a unit attention and hence may fail. An example:

[16575.983359] sd 0:0:0:3: [sdd] Starting disk
[16575.983693] sd 0:0:0:3: [sdd] Start/Stop Unit failed: Result: hostbyte=0x00 driverbyte=DRIVER_OK
[16575.983712] sd 0:0:0:3: [sdd] Sense Key : 0x6
[16575.983730] sd 0:0:0:3: [sdd] ASC=0x29 ASCQ=0x0
[16575.983738] sd 0:0:0:3: PM: dpm_run_callback(): scsi_bus_resume+0x0/0xa0 returns -5
[16575.983783] sd 0:0:0:3: PM: failed to resume async: error -5

Make the SCSI core retry the START STOP UNIT command if a retryable
error is encountered.

Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Mike Christie <michael.christie@oracle.com>
Change-Id: Ic8e0859c4455d93fcabee42f1598858571f5f3d1
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Bug: 348341595
Link: https://lore.kernel.org/linux-scsi/yq17ccp1i4b.fsf@ca-mkp.ca.oracle.com/T/#m52a26a50649b1d537cb129e5653f723509d6bde7
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche 2024-08-12 12:29:28 -07:00
parent d1d8ed2618
commit a32bc6101c
1 changed files with 1 additions and 0 deletions
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1
drivers/scsi/sd.c
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@ -3838,6 +3838,7 @@ static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
const struct scsi_exec_args exec_args = {
.sshdr = &sshdr,
.req_flags = BLK_MQ_REQ_PM,
.scmd_flags = SCMD_RETRY_PASSTHROUGH,
};
struct scsi_device *sdp = sdkp->device;
int res;