On 10/01/2014 07:51 AM, Christoph Hellwig wrote:
> Unfortunately the patch wasn't quite correct - all TEST_UNIT_READY
> commands are sent as BLOCK_PC, so this would basically revert James'
> original fix for the SATL case.
>
> Am I right to assume you only need the call to scsi_dh->check_sense and
> not the rest of the handling for the multipath path checker? If that's
> the case something like the patch below sould work:
This would work if we also duplicated the 02/04/02 K/C/Q check in
alua_check_sense
handler.
Wendy - can you try my patch below, along with Christoph's latest patch here
and see if that resolves the issue?
Thanks,
Brian
>
> diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
> index 5db8454..399c1c8 100644
> --- a/drivers/scsi/scsi_error.c
> +++ b/drivers/scsi/scsi_error.c
> @@ -459,14 +459,6 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
> if (! scsi_command_normalize_sense(scmd, &sshdr))
> return FAILED; /* no valid sense data */
>
> - if (scmd->cmnd[0] == TEST_UNIT_READY && scmd->scsi_done != scsi_eh_done)
> - /*
> - * nasty: for mid-layer issued TURs, we need to return the
> - * actual sense data without any recovery attempt. For eh
> - * issued ones, we need to try to recover and interpret
> - */
> - return SUCCESS;
> -
> scsi_report_sense(sdev, &sshdr);
>
> if (scsi_sense_is_deferred(&sshdr))
> @@ -482,6 +474,14 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
> /* handler does not care. Drop down to default handling */
> }
>
> + if (scmd->cmnd[0] == TEST_UNIT_READY && scmd->scsi_done != scsi_eh_done)
> + /*
> + * nasty: for mid-layer issued TURs, we need to return the
> + * actual sense data without any recovery attempt. For eh
> + * issued ones, we need to try to recover and interpret
> + */
> + return SUCCESS;
> +
> /*
> * Previous logic looked for FILEMARK, EOM or ILI which are
> * mainly associated with tapes and returned SUCCESS.
>
Signed-off-by: Brian King <brk...@linux.vnet.ibm.com>
---
drivers/scsi/device_handler/scsi_dh_alua.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN drivers/scsi/device_handler/scsi_dh_alua.c~alua_allow_restart
drivers/scsi/device_handler/scsi_dh_alua.c
--- linux/drivers/scsi/device_handler/scsi_dh_alua.c~alua_allow_restart
2014-10-06 10:19:16.184798305 -0500
+++ linux-bjking1/drivers/scsi/device_handler/scsi_dh_alua.c 2014-10-06
10:20:35.743165951 -0500
@@ -474,6 +474,13 @@ static int alua_check_sense(struct scsi_
* LUN Not Ready -- Offline
*/
return SUCCESS;
+ if (sdev->allow_restart &&
+ (sense_hdr->asc == 0x04) && (sense_hdr->ascq == 0x02))
+ /*
+ * if the device is not started, we need to wake
+ * the error handler to start the motor
+ */
+ return FAILED;
break;
case UNIT_ATTENTION:
if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
_
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
