1 files changed, 26 insertions, 15 deletions

diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index c772d8d2715..587992952b3 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -337,7 +337,7 @@ static void fc_exch_release(struct fc_exch *ep)
  * fc_exch_timer_cancel() - cancel exch timer
  * @ep:		The exchange whose timer to be canceled
  */
-static inline  void fc_exch_timer_cancel(struct fc_exch *ep)
+static inline void fc_exch_timer_cancel(struct fc_exch *ep)
 {
 	if (cancel_delayed_work(&ep->timeout_work)) {
 		FC_EXCH_DBG(ep, "Exchange timer canceled\n");
@@ -463,13 +463,7 @@ static void fc_exch_delete(struct fc_exch *ep)
 	fc_exch_release(ep);	/* drop hold for exch in mp */
 }
 
-/**
- * fc_seq_send() - Send a frame using existing sequence/exchange pair
- * @lport: The local port that the exchange will be sent on
- * @sp:	   The sequence to be sent
- * @fp:	   The frame to be sent on the exchange
- */
-static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
+static int fc_seq_send_locked(struct fc_lport *lport, struct fc_seq *sp,
 		       struct fc_frame *fp)
 {
 	struct fc_exch *ep;
@@ -479,7 +473,7 @@ static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
 	u8 fh_type = fh->fh_type;
 
 	ep = fc_seq_exch(sp);
-	WARN_ON((ep->esb_stat & ESB_ST_SEQ_INIT) != ESB_ST_SEQ_INIT);
+	WARN_ON(!(ep->esb_stat & ESB_ST_SEQ_INIT));
 
 	f_ctl = ntoh24(fh->fh_f_ctl);
 	fc_exch_setup_hdr(ep, fp, f_ctl);
@@ -502,17 +496,34 @@ static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
 	error = lport->tt.frame_send(lport, fp);
 
 	if (fh_type == FC_TYPE_BLS)
-		return error;
+		goto out;
 
 	/*
 	 * Update the exchange and sequence flags,
 	 * assuming all frames for the sequence have been sent.
 	 * We can only be called to send once for each sequence.
 	 */
-	spin_lock_bh(&ep->ex_lock);
 	ep->f_ctl = f_ctl & ~FC_FC_FIRST_SEQ;	/* not first seq */
 	if (f_ctl & FC_FC_SEQ_INIT)
 		ep->esb_stat &= ~ESB_ST_SEQ_INIT;
+out:
+	return error;
+}
+
+/**
+ * fc_seq_send() - Send a frame using existing sequence/exchange pair
+ * @lport: The local port that the exchange will be sent on
+ * @sp:	   The sequence to be sent
+ * @fp:	   The frame to be sent on the exchange
+ */
+static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
+		       struct fc_frame *fp)
+{
+	struct fc_exch *ep;
+	int error;
+	ep = fc_seq_exch(sp);
+	spin_lock_bh(&ep->ex_lock);
+	error = fc_seq_send_locked(lport, sp, fp);
 	spin_unlock_bh(&ep->ex_lock);
 	return error;
 }
@@ -629,7 +640,7 @@ static int fc_exch_abort_locked(struct fc_exch *ep,
 	if (fp) {
 		fc_fill_fc_hdr(fp, FC_RCTL_BA_ABTS, ep->did, ep->sid,
 			       FC_TYPE_BLS, FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
-		error = fc_seq_send(ep->lp, sp, fp);
+		error = fc_seq_send_locked(ep->lp, sp, fp);
 	} else
 		error = -ENOBUFS;
 	return error;
@@ -1132,7 +1143,7 @@ static void fc_seq_send_last(struct fc_seq *sp, struct fc_frame *fp,
 	f_ctl = FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT;
 	f_ctl |= ep->f_ctl;
 	fc_fill_fc_hdr(fp, rctl, ep->did, ep->sid, fh_type, f_ctl, 0);
-	fc_seq_send(ep->lp, sp, fp);
+	fc_seq_send_locked(ep->lp, sp, fp);
 }
 
 /**
@@ -1307,8 +1318,8 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
 		ap->ba_low_seq_cnt = htons(sp->cnt);
 	}
 	sp = fc_seq_start_next_locked(sp);
-	spin_unlock_bh(&ep->ex_lock);
 	fc_seq_send_last(sp, fp, FC_RCTL_BA_ACC, FC_TYPE_BLS);
+	spin_unlock_bh(&ep->ex_lock);
 	fc_frame_free(rx_fp);
 	return;
 
@@ -1556,7 +1567,7 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
 		    fc_exch_rctl_name(fh->fh_r_ctl));
 
 	if (cancel_delayed_work_sync(&ep->timeout_work)) {
-		FC_EXCH_DBG(ep, "Exchange timer canceled\n");
+		FC_EXCH_DBG(ep, "Exchange timer canceled due to ABTS response\n");
 		fc_exch_release(ep);	/* release from pending timer hold */
 	}