2 files changed, 29 insertions, 0 deletions

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index e0b5b15c355b..1f124c0351b4 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -558,6 +558,22 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
         return sp;
 }
 
+/*
+ * Set the response handler for the exchange associated with a sequence.
+ */
+static void fc_seq_set_resp(struct fc_seq *sp,
+                            void (*resp)(struct fc_seq *, struct fc_frame *,
+                                         void *),
+                            void *arg)
+{
+        struct fc_exch *ep = fc_seq_exch(sp);
+
+        spin_lock_bh(&ep->ex_lock);
+        ep->resp = resp;
+        ep->arg = arg;
+        spin_unlock_bh(&ep->ex_lock);
+}
+
 /**
  * fc_seq_exch_abort() - Abort an exchange and sequence
  * @req_sp:     The sequence to be aborted
@@ -2329,6 +2345,9 @@ int fc_exch_init(struct fc_lport *lport)
         if (!lport->tt.seq_start_next)
                 lport->tt.seq_start_next = fc_seq_start_next;
 
+        if (!lport->tt.seq_set_resp)
+                lport->tt.seq_set_resp = fc_seq_set_resp;
+
         if (!lport->tt.exch_seq_send)
                 lport->tt.exch_seq_send = fc_exch_seq_send;
 
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 3ae2a760b4f3..3b8f5d83611b 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -555,6 +555,16 @@ struct libfc_function_template {
         struct fc_seq *(*seq_start_next)(struct fc_seq *);
 
         /*
+         * Set a response handler for the exchange of the sequence.
+         *
+         * STATUS: OPTIONAL
+         */
+        void (*seq_set_resp)(struct fc_seq *sp,
+                             void (*resp)(struct fc_seq *, struct fc_frame *,
+                                          void *),
+                             void *arg);
+
+        /*
          * Assign a sequence for an incoming request frame.
          *
          * STATUS: OPTIONAL