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path: root/drivers/ata/libata-eh.c
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Diffstat (limited to 'drivers/ata/libata-eh.c')
-rw-r--r--drivers/ata/libata-eh.c117
1 files changed, 60 insertions, 57 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 34303ce67c14..a6c901811802 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -565,17 +565,23 @@ void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap,
{
int i;
unsigned long flags;
+ struct scsi_cmnd *scmd, *tmp;
+ int nr_timedout = 0;
/* make sure sff pio task is not running */
ata_sff_flush_pio_task(ap);
+ if (!ap->ops->error_handler)
+ return;
+
/* synchronize with host lock and sort out timeouts */
- /* For new EH, all qcs are finished in one of three ways -
+ /*
+ * For new EH, all qcs are finished in one of three ways -
* normal completion, error completion, and SCSI timeout.
* Both completions can race against SCSI timeout. When normal
* completion wins, the qc never reaches EH. When error
- * completion wins, the qc has ATA_QCFLAG_FAILED set.
+ * completion wins, the qc has ATA_QCFLAG_EH set.
*
* When SCSI timeout wins, things are a bit more complex.
* Normal or error completion can occur after the timeout but
@@ -584,64 +590,61 @@ void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap,
* timed out iff its associated qc is active and not failed.
*/
spin_lock_irqsave(ap->lock, flags);
- if (ap->ops->error_handler) {
- struct scsi_cmnd *scmd, *tmp;
- int nr_timedout = 0;
-
- /* This must occur under the ap->lock as we don't want
- a polled recovery to race the real interrupt handler
-
- The lost_interrupt handler checks for any completed but
- non-notified command and completes much like an IRQ handler.
- We then fall into the error recovery code which will treat
- this as if normal completion won the race */
-
- if (ap->ops->lost_interrupt)
- ap->ops->lost_interrupt(ap);
+ /*
+ * This must occur under the ap->lock as we don't want
+ * a polled recovery to race the real interrupt handler
+ *
+ * The lost_interrupt handler checks for any completed but
+ * non-notified command and completes much like an IRQ handler.
+ *
+ * We then fall into the error recovery code which will treat
+ * this as if normal completion won the race
+ */
+ if (ap->ops->lost_interrupt)
+ ap->ops->lost_interrupt(ap);
- list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) {
- struct ata_queued_cmd *qc;
+ list_for_each_entry_safe(scmd, tmp, eh_work_q, eh_entry) {
+ struct ata_queued_cmd *qc;
- ata_qc_for_each_raw(ap, qc, i) {
- if (qc->flags & ATA_QCFLAG_ACTIVE &&
- qc->scsicmd == scmd)
- break;
- }
+ ata_qc_for_each_raw(ap, qc, i) {
+ if (qc->flags & ATA_QCFLAG_ACTIVE &&
+ qc->scsicmd == scmd)
+ break;
+ }
- if (i < ATA_MAX_QUEUE) {
- /* the scmd has an associated qc */
- if (!(qc->flags & ATA_QCFLAG_FAILED)) {
- /* which hasn't failed yet, timeout */
- qc->err_mask |= AC_ERR_TIMEOUT;
- qc->flags |= ATA_QCFLAG_FAILED;
- nr_timedout++;
- }
- } else {
- /* Normal completion occurred after
- * SCSI timeout but before this point.
- * Successfully complete it.
- */
- scmd->retries = scmd->allowed;
- scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
+ if (i < ATA_MAX_QUEUE) {
+ /* the scmd has an associated qc */
+ if (!(qc->flags & ATA_QCFLAG_EH)) {
+ /* which hasn't failed yet, timeout */
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ qc->flags |= ATA_QCFLAG_EH;
+ nr_timedout++;
}
+ } else {
+ /* Normal completion occurred after
+ * SCSI timeout but before this point.
+ * Successfully complete it.
+ */
+ scmd->retries = scmd->allowed;
+ scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
}
+ }
- /* If we have timed out qcs. They belong to EH from
- * this point but the state of the controller is
- * unknown. Freeze the port to make sure the IRQ
- * handler doesn't diddle with those qcs. This must
- * be done atomically w.r.t. setting QCFLAG_FAILED.
- */
- if (nr_timedout)
- __ata_port_freeze(ap);
+ /*
+ * If we have timed out qcs. They belong to EH from
+ * this point but the state of the controller is
+ * unknown. Freeze the port to make sure the IRQ
+ * handler doesn't diddle with those qcs. This must
+ * be done atomically w.r.t. setting ATA_QCFLAG_EH.
+ */
+ if (nr_timedout)
+ __ata_port_freeze(ap);
+ /* initialize eh_tries */
+ ap->eh_tries = ATA_EH_MAX_TRIES;
- /* initialize eh_tries */
- ap->eh_tries = ATA_EH_MAX_TRIES;
- }
spin_unlock_irqrestore(ap->lock, flags);
-
}
EXPORT_SYMBOL(ata_scsi_cmd_error_handler);
@@ -911,12 +914,12 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
WARN_ON(!ap->ops->error_handler);
- qc->flags |= ATA_QCFLAG_FAILED;
+ qc->flags |= ATA_QCFLAG_EH;
ata_eh_set_pending(ap, 1);
/* The following will fail if timeout has already expired.
* ata_scsi_error() takes care of such scmds on EH entry.
- * Note that ATA_QCFLAG_FAILED is unconditionally set after
+ * Note that ATA_QCFLAG_EH is unconditionally set after
* this function completes.
*/
blk_abort_request(scsi_cmd_to_rq(qc->scsicmd));
@@ -994,7 +997,7 @@ static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link)
/* include internal tag in iteration */
ata_qc_for_each_with_internal(ap, qc, tag) {
if (qc && (!link || qc->dev->link == link)) {
- qc->flags |= ATA_QCFLAG_FAILED;
+ qc->flags |= ATA_QCFLAG_EH;
ata_qc_complete(qc);
nr_aborted++;
}
@@ -1954,7 +1957,7 @@ static void ata_eh_link_autopsy(struct ata_link *link)
all_err_mask |= ehc->i.err_mask;
ata_qc_for_each_raw(ap, qc, tag) {
- if (!(qc->flags & ATA_QCFLAG_FAILED) ||
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
qc->flags & ATA_QCFLAG_RETRY ||
ata_dev_phys_link(qc->dev) != link)
continue;
@@ -2232,7 +2235,7 @@ static void ata_eh_link_report(struct ata_link *link)
desc = ehc->i.desc;
ata_qc_for_each_raw(ap, qc, tag) {
- if (!(qc->flags & ATA_QCFLAG_FAILED) ||
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
ata_dev_phys_link(qc->dev) != link ||
((qc->flags & ATA_QCFLAG_QUIET) &&
qc->err_mask == AC_ERR_DEV))
@@ -2298,7 +2301,7 @@ static void ata_eh_link_report(struct ata_link *link)
char data_buf[20] = "";
char cdb_buf[70] = "";
- if (!(qc->flags & ATA_QCFLAG_FAILED) ||
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
ata_dev_phys_link(qc->dev) != link || !qc->err_mask)
continue;
@@ -3802,7 +3805,7 @@ void ata_eh_finish(struct ata_port *ap)
/* retry or finish qcs */
ata_qc_for_each_raw(ap, qc, tag) {
- if (!(qc->flags & ATA_QCFLAG_FAILED))
+ if (!(qc->flags & ATA_QCFLAG_EH))
continue;
if (qc->err_mask) {
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-28 11:49:43 +0300