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

Steven Wahl · jonmason · commit 5c43c52d5fb6 · 2016-12-23T16:10:50.000-05:00
Correct ntb_peer_spad_read for case when callback is not supplied

Signed-off-by: Steve Wahl &lt;Steve.Wahl@dell.com&gt;
Acked-by: Allen Hubbe &lt;Allen.Hubbe@dell.com&gt;
Signed-off-by: Jon Mason &lt;jdmason@kudzu.us&gt;
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);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -968,6 +968,9 @@ static inline int ntb_peer_spad_addr(struct ntb_dev *ntb, int idx,`
`968`	`968`	`*/`
`969`	`969`	`static inline u32 ntb_peer_spad_read(struct ntb_dev *ntb, int idx)`
`970`	`970`	`{`
	`971`	`+ if (!ntb->ops->peer_spad_read)`
	`972`	`+ return 0;`
	`973`	`+`
`971`	`974`	`return ntb->ops->peer_spad_read(ntb, idx);`
`972`	`975`	`}`
`973`	`976`