[SCSI] qla2xxx: Enable queue-full throttling when UNDERRUN detected.
As ISP24xx firmware can return a CS_DATA_UNDERRUN completion
status when the storage has returned a
SAM_STAT_TASK_SET_FULL scsi-status.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 6e19769b..df69dc0 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -987,6 +987,22 @@
if (lscsi_status != 0) {
cp->result = DID_OK << 16 | lscsi_status;
+ if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
+ DEBUG2(printk(KERN_INFO
+ "scsi(%ld): QUEUE FULL status detected "
+ "0x%x-0x%x.\n", ha->host_no, comp_status,
+ scsi_status));
+
+ /*
+ * Adjust queue depth for all luns on the
+ * port.
+ */
+ fcport->last_queue_full = jiffies;
+ starget_for_each_device(
+ cp->device->sdev_target, fcport,
+ qla2x00_adjust_sdev_qdepth_down);
+ break;
+ }
if (lscsi_status != SS_CHECK_CONDITION)
break;