Commit 10dab226 authored by Jamie Wellnitz's avatar Jamie Wellnitz Committed by James Bottomley

[SCSI] sd: Fix handling of NO_SENSE check condition

The current handling of NO_SENSE check condition is the same as
RECOVERED_ERROR, and assumes that in both cases, the I/O was fully
transferred.

We have seen cases of arrays returning with NO_SENSE (no error), but
the I/O was not completely transferred, thus residual set.  Thus,
rather than return good_bytes as the entire transfer, set good_bytes
to 0, so that the midlayer then applies the residual in calculating
the transfer, and for sd, will fail the I/O and fall into a retry
path.
Signed-off-by: default avatarJamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 6c5121b7
...@@ -1054,7 +1054,6 @@ static int sd_done(struct scsi_cmnd *SCpnt) ...@@ -1054,7 +1054,6 @@ static int sd_done(struct scsi_cmnd *SCpnt)
good_bytes = sd_completed_bytes(SCpnt); good_bytes = sd_completed_bytes(SCpnt);
break; break;
case RECOVERED_ERROR: case RECOVERED_ERROR:
case NO_SENSE:
/* Inform the user, but make sure that it's not treated /* Inform the user, but make sure that it's not treated
* as a hard error. * as a hard error.
*/ */
...@@ -1063,6 +1062,15 @@ static int sd_done(struct scsi_cmnd *SCpnt) ...@@ -1063,6 +1062,15 @@ static int sd_done(struct scsi_cmnd *SCpnt)
memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
good_bytes = scsi_bufflen(SCpnt); good_bytes = scsi_bufflen(SCpnt);
break; break;
case NO_SENSE:
/* This indicates a false check condition, so ignore it. An
* unknown amount of data was transferred so treat it as an
* error.
*/
scsi_print_sense("sd", SCpnt);
SCpnt->result = 0;
memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
break;
case ABORTED_COMMAND: case ABORTED_COMMAND:
if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */ if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */
scsi_print_result(SCpnt); scsi_print_result(SCpnt);
......
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