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[PATCH] libata: don't schedule EH on wcache on/off if old EH

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Do not schedule EH for revalidation on wcache on/off if old EH.  Old
EH cannot handle it and will result in WARN_ON()'s and oops.

This closes bug #7412.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-11-22 12:39:43 +09:00 committed by Jeff Garzik
parent 2ea5814472
commit c31f571d9f
1 changed files with 7 additions and 5 deletions
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12
drivers/ata/libata-scsi.c
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@ -1451,6 +1451,7 @@ nothing_to_do:
static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct scsi_cmnd *cmd = qc->scsicmd;
u8 *cdb = cmd->cmnd;
int need_sense = (qc->err_mask != 0);
@ -1459,11 +1460,12 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
* schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
* cache
*/
if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
if (ap->ops->error_handler &&
!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
((qc->tf.feature == SETFEATURES_WC_ON) ||
(qc->tf.feature == SETFEATURES_WC_OFF))) {
qc->ap->eh_info.action |= ATA_EH_REVALIDATE;
ata_port_schedule_eh(qc->ap);
ap->eh_info.action |= ATA_EH_REVALIDATE;
ata_port_schedule_eh(ap);
}
/* For ATA pass thru (SAT) commands, generate a sense block if
@ -1490,8 +1492,8 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
}
}
if (need_sense && !qc->ap->ops->error_handler)
ata_dump_status(qc->ap->id, &qc->result_tf);
if (need_sense && !ap->ops->error_handler)
ata_dump_status(ap->id, &qc->result_tf);
qc->scsidone(cmd);