diff options
| author | Damien Le Moal <dlemoal@kernel.org> | 2025-02-28 12:17:51 +0900 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-03-03 22:11:47 -0500 |
| commit | e6a815673b3b4ed69745f7a954742e12fc60139a (patch) | |
| tree | 0132ce9d85423a7fb9b84e7a6ae5b5e2becdcabc /drivers/scsi/scsi_error.c | |
| parent | 0711f1966a523d77d4c5f00776a7bd073d56251a (diff) | |
scsi: scsi_error: Add comments to scsi_check_sense()
Add a comment block describing the COMPLETED case with ASC/ASCQ 0x55/0xA
to mention that it relates to command duration limits very special
policy 0xD command completion.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20250228031751.12083-1-dlemoal@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_error.c')
| -rw-r--r-- | drivers/scsi/scsi_error.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index ec60e8a96b11..376b8897ab90 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -723,6 +723,13 @@ enum scsi_disposition scsi_check_sense(struct scsi_cmnd *scmd) return SUCCESS; case COMPLETED: + /* + * A command using command duration limits (CDL) with a + * descriptor set with policy 0xD may be completed with success + * and the sense data DATA CURRENTLY UNAVAILABLE, indicating + * that the command was in fact aborted because it exceeded its + * duration limit. Never retry these commands. + */ if (sshdr.asc == 0x55 && sshdr.ascq == 0x0a) { set_scsi_ml_byte(scmd, SCSIML_STAT_DL_TIMEOUT); req->cmd_flags |= REQ_FAILFAST_DEV; |