qla2xxx: Handle AEN8014 incoming port logout.

When we get logged out, mark the port lost and set dpc flag for relogin.
Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

drivers/scsi/qla2xxx/qla_dbg.c

@@ -26,7 +26,7 @@
  * |                              |                    | 0x3036,0x3038  |
  * |                              |                    | 0x303a		|
  * | DPC Thread                   |       0x4023       | 0x4002,0x4013  |
- * | Async Events                 |       0x5087       | 0x502b-0x502f  |
+ * | Async Events                 |       0x508a       | 0x502b-0x502f  |
  * |                              |                    | 0x5047		|
  * |                              |                    | 0x5084,0x5075	|
  * |                              |                    | 0x503d,0x5044  |

drivers/scsi/qla2xxx/qla_isr.c

@@ -560,6 +560,17 @@ qla2x00_is_a_vp_did(scsi_qla_host_t *vha, uint32_t rscn_entry)
 	return ret;
 }
 
+static inline fc_port_t *
+qla2x00_find_fcport_by_loopid(scsi_qla_host_t *vha, uint16_t loop_id)
+{
+	fc_port_t *fcport;
+
+	list_for_each_entry(fcport, &vha->vp_fcports, list)
+		if (fcport->loop_id == loop_id)
+			return fcport;
+	return NULL;
+}
+
 /**
  * qla2x00_async_event() - Process aynchronous events.
  * @ha: SCSI driver HA context
@@ -897,11 +908,29 @@ qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 			(mb[1] != 0xffff)) && vha->vp_idx != (mb[3] & 0xff))
 			break;
 
-		/* Global event -- port logout or port unavailable. */
-		if (mb[1] == 0xffff && mb[2] == 0x7) {
+		if (mb[2] == 0x7) {
 			ql_dbg(ql_dbg_async, vha, 0x5010,
-			    "Port unavailable %04x %04x %04x.\n",
+			    "Port %s %04x %04x %04x.\n",
+			    mb[1] == 0xffff ? "unavailable" : "logout",
 			    mb[1], mb[2], mb[3]);
+
+			if (mb[1] == 0xffff)
+				goto global_port_update;
+
+			/* Port logout */
+			fcport = qla2x00_find_fcport_by_loopid(vha, mb[1]);
+			if (!fcport)
+				break;
+			if (atomic_read(&fcport->state) != FCS_ONLINE)
+				break;
+			ql_dbg(ql_dbg_async, vha, 0x508a,
+			    "Marking port lost loopid=%04x portid=%06x.\n",
+			    fcport->loop_id, fcport->d_id.b24);
+			qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
+			break;
+
+global_port_update:
+			/* Port unavailable. */
 			ql_log(ql_log_warn, vha, 0x505e,
 			    "Link is offline.\n");