be2iscsi: Added return value check for mgmt_get_all_if_id

Use of mutex_lock_interruptible can return -EINTR, handle and log the
error.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_iscsi.c

@@ -367,13 +367,14 @@ beiscsi_set_vlan_tag(struct Scsi_Host *shost,
 		      struct iscsi_iface_param_info *iface_param)
 {
 	struct beiscsi_hba *phba = iscsi_host_priv(shost);
-	int ret = 0;
+	int ret;
 
 	/* Get the Interface Handle */
-	if (mgmt_get_all_if_id(phba)) {
+	ret = mgmt_get_all_if_id(phba);
+	if (ret) {
 		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 			    "BS_%d : Getting Interface Handle Failed\n");
-		return -EIO;
+		return ret;
 	}
 
 	switch (iface_param->param) {

drivers/scsi/be2iscsi/be_mgmt.c

@@ -1025,8 +1025,9 @@ int mgmt_set_ip(struct beiscsi_hba *phba,
 	uint32_t ip_type;
 	int rc;
 
-	if (mgmt_get_all_if_id(phba))
-		return -EIO;
+	rc = mgmt_get_all_if_id(phba);
+	if (rc)
+		return rc;
 
 	ip_type = (ip_param->param == ISCSI_NET_PARAM_IPV6_ADDR) ?
 		BE2_IPV6 : BE2_IPV4 ;
@@ -1195,8 +1196,9 @@ int mgmt_get_if_info(struct beiscsi_hba *phba, int ip_type,
 	uint32_t ioctl_size = sizeof(struct be_cmd_get_if_info_resp);
 	int rc;
 
-	if (mgmt_get_all_if_id(phba))
-		return -EIO;
+	rc = mgmt_get_all_if_id(phba);
+	if (rc)
+		return rc;
 
 	do {
 		rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,