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[SCSI] Fix error handling for DIF/DIX

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patch

commit b60af5b0ad
Author: Alan Stern <stern@rowland.harvard.edu>
Date:   Mon Nov 3 15:56:47 2008 -0500

    [SCSI] simplify scsi_io_completion()

broke DIX error handling.  Also, we are now using EILSEQ to indicate
integrity errors to the upper layers (as opposed to regular EIO
failures).  This allows filesystems to inspect buffers and decide
whether to retry the I/O.  Update scsi_io_completion() accordingly.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Martin K. Petersen 2009-01-04 03:04:31 -05:00 committed by James Bottomley
parent 4f5299ac4e
commit 3e695f89c5
1 changed files with 8 additions and 1 deletions
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9
drivers/scsi/scsi_lib.c
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@ -980,6 +980,8 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
return;
this_count = blk_rq_bytes(req);
error = -EIO;
if (host_byte(result) == DID_RESET) {
/* Third party bus reset or reset for error recovery
* reasons. Just retry the command and see what
@ -1021,13 +1023,18 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
/* This will issue a new 6-byte command. */
cmd->device->use_10_for_rw = 0;
action = ACTION_REPREP;
} else if (sshdr.asc == 0x10) /* DIX */ {
description = "Host Data Integrity Failure";
action = ACTION_FAIL;
error = -EILSEQ;
} else
action = ACTION_FAIL;
break;
case ABORTED_COMMAND:
if (sshdr.asc == 0x10) { /* DIF */
description = "Target Data Integrity Failure";
action = ACTION_FAIL;
description = "Data Integrity Failure";
error = -EILSEQ;
} else
action = ACTION_RETRY;
break;