1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/scsi/libfc/fc_elsct.c b/drivers/scsi/libfc/fc_elsct.c
index 5e8b011af50e..d655924d46b6 100644
--- a/drivers/scsi/libfc/fc_elsct.c
+++ b/drivers/scsi/libfc/fc_elsct.c
@@ -70,3 +70,41 @@ int fc_elsct_init(struct fc_lport *lport)
         return 0;
 }
 EXPORT_SYMBOL(fc_elsct_init);
+
+/**
+ * fc_els_resp_type() - return string describing ELS response for debug.
+ * @fp: frame pointer with possible error code.
+ */
+const char *fc_els_resp_type(struct fc_frame *fp)
+{
+        const char *msg;
+        if (IS_ERR(fp)) {
+                switch (-PTR_ERR(fp)) {
+                case FC_NO_ERR:
+                        msg = "response no error";
+                        break;
+                case FC_EX_TIMEOUT:
+                        msg = "response timeout";
+                        break;
+                case FC_EX_CLOSED:
+                        msg = "response closed";
+                        break;
+                default:
+                        msg = "response unknown error";
+                        break;
+                }
+        } else {
+                switch (fc_frame_payload_op(fp)) {
+                case ELS_LS_ACC:
+                        msg = "accept";
+                        break;
+                case ELS_LS_RJT:
+                        msg = "reject";
+                        break;
+                default:
+                        msg = "response unknown ELS";
+                        break;
+                }
+        }
+        return msg;
+}