3.18-stable review patch. If anyone has any objections, please let me know.
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From: Damien Le Moal damien.lemoal@wdc.com
[ Upstream commit 804689ad2d9b66d0d3920b48cf05881049d44589 ]
For failed commands with valid sense data (e.g. NCQ commands), scsi_check_sense() is used in ata_analyze_tf() to determine if the command can be retried. In such case, rely on this decision and ignore the command error mask based decision done in ata_worth_retry().
This fixes useless retries of commands such as unaligned writes on zoned disks (TYPE_ZAC).
Signed-off-by: Damien Le Moal damien.lemoal@wdc.com Reviewed-by: Hannes Reinecke hare@suse.com Signed-off-by: Tejun Heo tj@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/ata/libata-eh.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
--- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2173,12 +2173,16 @@ static void ata_eh_link_autopsy(struct a if (qc->err_mask & ~AC_ERR_OTHER) qc->err_mask &= ~AC_ERR_OTHER;
- /* SENSE_VALID trumps dev/unknown error and revalidation */ + /* + * SENSE_VALID trumps dev/unknown error and revalidation. Upper + * layers will determine whether the command is worth retrying + * based on the sense data and device class/type. Otherwise, + * determine directly if the command is worth retrying using its + * error mask and flags. + */ if (qc->flags & ATA_QCFLAG_SENSE_VALID) qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); - - /* determine whether the command is worth retrying */ - if (ata_eh_worth_retry(qc)) + else if (ata_eh_worth_retry(qc)) qc->flags |= ATA_QCFLAG_RETRY;
/* accumulate error info */