This is a note to let you know that I've just added the patch titled
libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libata-make-ata_eh_qc_retry-bump-scmd-allowed-on-bogus-failures.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f13e220161e738c2710b9904dcb3cf8bb0bcce61 Mon Sep 17 00:00:00 2001
From: Gwendal Grignou <gwendal@xxxxxxxxxx>
Date: Fri, 7 Aug 2009 16:17:49 -0700
Subject: libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures
From: Gwendal Grignou <gwendal@xxxxxxxxxx>
commit f13e220161e738c2710b9904dcb3cf8bb0bcce61 upstream.
libata EH decrements scmd->retries when the command failed for reasons
unrelated to the command itself so that, for example, commands aborted
due to suspend / resume cycle don't get penalized; however,
decrementing scmd->retries isn't enough for ATA passthrough commands.
Without this fix, ATA passthrough commands are not resend to the
drive, and no error is signalled to the caller because:
- allowed retry count is 1
- ata_eh_qc_complete fill the sense data, so result is valid
- sense data is filled with untouched ATA registers.
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ata/libata-eh.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1322,14 +1322,14 @@ void ata_eh_qc_complete(struct ata_queue
* should be retried. To be used from EH.
*
* SCSI midlayer limits the number of retries to scmd->allowed.
- * scmd->retries is decremented for commands which get retried
+ * scmd->allowed is incremented for commands which get retried
* due to unrelated failures (qc->err_mask is zero).
*/
void ata_eh_qc_retry(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
- if (!qc->err_mask && scmd->retries)
- scmd->retries--;
+ if (!qc->err_mask)
+ scmd->allowed++;
__ata_eh_qc_complete(qc);
}
Patches currently in stable-queue which might be from gwendal@xxxxxxxxxx are
queue-3.11/libata-make-ata_eh_qc_retry-bump-scmd-allowed-on-bogus-failures.patch
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