Update the stock interrupt handler such that it unconditionally clears
interrupts from a frozen port.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/libata-core.c | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
c14f71dfb9bbaca1e2308436b0fda06b5ae9901d
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 2e80930..fc9ae17 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4502,12 +4502,20 @@ irqreturn_t ata_interrupt (int irq, void
for (i = 0; i < host_set->n_ports; i++) {
struct ata_port *ap;
+ struct ata_queued_cmd *qc;
ap = host_set->ports[i];
- if (ap &&
- !(ap->flags & (ATA_FLAG_DISABLED | ATA_FLAG_NOINTR))) {
- struct ata_queued_cmd *qc;
+ if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED))
+ continue;
+ if (unlikely(ap->flags & ATA_FLAG_FROZEN)) {
+ /* port frozen, ack unconditionally */
+ ata_irq_ack(ap, 0);
+ handled = 1;
+ continue;
+ }
+
+ if (!(ap->flags & ATA_FLAG_NOINTR)) {
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
(qc->flags & ATA_QCFLAG_ACTIVE))
--
1.2.4
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