NTB: correct ntb_peer_spad_read for case when callback is not supplied.

Correct ntb_peer_spad_read for case when callback is not supplied Signed-off-by: Steve Wahl <Steve.Wahl@dell.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
mariux64 · Dec 23, 2016 · 5c43c52 · 5c43c52
1 parent bc034e5
commit 5c43c52
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/include/linux/ntb.h b/include/linux/ntb.h
@@ -968,6 +968,9 @@ static inline int ntb_peer_spad_addr(struct ntb_dev *ntb, int idx,
  */
 static inline u32 ntb_peer_spad_read(struct ntb_dev *ntb, int idx)
 {
+	if (!ntb->ops->peer_spad_read)
+		return 0;
+
 	return ntb->ops->peer_spad_read(ntb, idx);
 }