[SCSI] qla2xxx: Wait for IDC complete event to finish loopback operation.

Wait for the IDC complete AEN before returning the loopback operation back to
the application to make sure the port is put back into normal operations.

Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_bsg.c

@@ -535,7 +535,7 @@ done:
 /* Disable loopback mode */
 static inline int
 qla81xx_reset_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
-			    int wait)
+			    int wait, int wait2)
 {
 	int ret = 0;
 	int rval = 0;
@@ -556,28 +556,45 @@ qla81xx_reset_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
 		memcpy(&new_config[1], &config[1], sizeof(uint16_t) * 3) ;
 
 		ha->notify_dcbx_comp = wait;
+		ha->notify_lb_portup_comp = wait2;
+
 		ret = qla81xx_set_port_config(vha, new_config);
 		if (ret != QLA_SUCCESS) {
 			ql_log(ql_log_warn, vha, 0x7025,
 			    "Set port config failed.\n");
 			ha->notify_dcbx_comp = 0;
+			ha->notify_lb_portup_comp = 0;
 			rval = -EINVAL;
 			goto done_reset_internal;
 		}
 
 		/* Wait for DCBX complete event */
 		if (wait && !wait_for_completion_timeout(&ha->dcbx_comp,
-			(20 * HZ))) {
+			(DCBX_COMP_TIMEOUT * HZ))) {
 			ql_dbg(ql_dbg_user, vha, 0x7026,
-			    "State change notification not received.\n");
+			    "DCBX completion not received.\n");
 			ha->notify_dcbx_comp = 0;
+			ha->notify_lb_portup_comp = 0;
 			rval = -EINVAL;
 			goto done_reset_internal;
 		} else
 			ql_dbg(ql_dbg_user, vha, 0x7027,
-			    "State change received.\n");
+			    "DCBX completion received.\n");
+
+		if (wait2 &&
+		    !wait_for_completion_timeout(&ha->lb_portup_comp,
+		    (LB_PORTUP_COMP_TIMEOUT * HZ))) {
+			ql_dbg(ql_dbg_user, vha, 0x70c5,
+			    "Port up completion not received.\n");
+			ha->notify_lb_portup_comp = 0;
+			rval = -EINVAL;
+			goto done_reset_internal;
+		} else
+			ql_dbg(ql_dbg_user, vha, 0x70c6,
+			    "Port up completion received.\n");
 
 		ha->notify_dcbx_comp = 0;
+		ha->notify_lb_portup_comp = 0;
 	}
 done_reset_internal:
 	return rval;
@@ -618,10 +635,11 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
 	}
 
 	/* Wait for DCBX complete event */
-	if (!wait_for_completion_timeout(&ha->dcbx_comp, (20 * HZ))) {
+	if (!wait_for_completion_timeout(&ha->dcbx_comp,
+	    (DCBX_COMP_TIMEOUT * HZ))) {
 		ql_dbg(ql_dbg_user, vha, 0x7022,
-		    "State change notification not received.\n");
+		    "DCBX completion not received.\n");
-		ret = qla81xx_reset_loopback_mode(vha, new_config, 0);
+		ret = qla81xx_reset_loopback_mode(vha, new_config, 0, 0);
 		/*
 		 * If the reset of the loopback mode doesn't work take a FCoE
 		 * dump and reset the chip.
@@ -639,7 +657,7 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
 			ha->flags.idc_compl_status = 0;
 		} else
 			ql_dbg(ql_dbg_user, vha, 0x7023,
-			    "State change received.\n");
+			    "DCBX completion received.\n");
 	}
 
 	ha->notify_dcbx_comp = 0;
@@ -749,6 +767,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 		if (IS_QLA81XX(ha) || IS_QLA8031(ha)) {
 			memset(config, 0, sizeof(config));
 			memset(new_config, 0, sizeof(new_config));
+
 			if (qla81xx_get_port_config(vha, config)) {
 				ql_log(ql_log_warn, vha, 0x701f,
 				    "Get port config failed.\n");
@@ -773,7 +792,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 					    config, new_config, elreq.options);
 				else
 					rval = qla81xx_reset_loopback_mode(vha,
-					    config, 1);
+					    config, 1, 0);
 			else
 				rval = qla81xx_set_loopback_mode(vha, config,
 				    new_config, elreq.options);
@@ -817,7 +836,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 				 * Also clear internal loopback
 				 */
 				ret = qla81xx_reset_loopback_mode(vha,
-				    new_config, 0);
+				    new_config, 0, 1);
 				if (ret) {
 					/*
 					 * If the reset of the loopback mode

drivers/scsi/qla2xxx/qla_def.h

@@ -2882,7 +2882,13 @@ struct qla_hw_data {
 	struct completion mbx_cmd_comp; /* Serialize mbx access */
 	struct completion mbx_intr_comp;  /* Used for completion notification */
 	struct completion dcbx_comp;	/* For set port config notification */
+	struct completion lb_portup_comp; /* Used to wait for link up during
+					   * loopback */
+#define DCBX_COMP_TIMEOUT	20
+#define LB_PORTUP_COMP_TIMEOUT	10
+
 	int notify_dcbx_comp;
+	int notify_lb_portup_comp;
 	struct mutex selflogin_lock;
 
 	/* Basic firmware related information. */

drivers/scsi/qla2xxx/qla_isr.c

@@ -1032,6 +1032,9 @@ skip_rio:
 			}
 		}
 	case MBA_IDC_COMPLETE:
+		if (ha->notify_lb_portup_comp)
+			complete(&ha->lb_portup_comp);
+		/* Fallthru */
 	case MBA_IDC_TIME_EXT:
 		if (IS_QLA81XX(vha->hw) || IS_QLA8031(vha->hw))
 			qla81xx_idc_event(vha, mb[0], mb[1]);

drivers/scsi/qla2xxx/qla_os.c

@@ -2465,6 +2465,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	complete(&ha->mbx_cmd_comp);
 	init_completion(&ha->mbx_intr_comp);
 	init_completion(&ha->dcbx_comp);
+	init_completion(&ha->lb_portup_comp);
 
 	set_bit(0, (unsigned long *) ha->vp_idx_map);