It's common to get a UA when doing PR commands. It could be due to a target restarting, transport level relogin or other PR commands like a release causing it. The upper layers don't get the sense and in some cases have no idea if it's a SCSI device, so this has the sd layer retry. Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx> Reviewed-by: Martin Wilck <mwilck@xxxxxxxx> --- drivers/scsi/sd.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index c0c29b948476..d19e2d20ad91 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1723,6 +1723,16 @@ static int sd_pr_command(struct block_device *bdev, u8 sa, int result; u8 cmd[16] = { 0, }; u8 data[24] = { 0, }; + struct scsi_failure failures[] = { + { + .sense = UNIT_ATTENTION, + .asc = SCMD_FAILURE_ASC_ANY, + .ascq = SCMD_FAILURE_ASCQ_ANY, + .allowed = 5, + .result = SAM_STAT_CHECK_CONDITION, + }, + {}, + }; cmd[0] = PERSISTENT_RESERVE_OUT; cmd[1] = sa; @@ -1741,7 +1751,8 @@ static int sd_pr_command(struct block_device *bdev, u8 sa, .buf_len = sizeof(data), .sshdr = &sshdr, .timeout = SD_TIMEOUT, - .retries = sdkp->max_retries })); + .retries = sdkp->max_retries, + .failures = failures })); if (scsi_status_is_check_condition(result) && scsi_sense_valid(&sshdr)) { -- 2.25.1