Re: [PATCH v2] usb: usb251xb: fix to avoid potential NULL pointer dereference

From: Richard Leitner
Date: Wed Mar 20 2019 - 06:07:30 EST


Hi, thanks for the updated patch.

Please find my comments below.

On 19/03/2019 21:26, Aditya Pakki wrote:
of_match_device in usb251xb_probe can fail and returns a NULL pointer.
The patch avoids a potential NULL pointer dereference in this scenario.

--

This should be 3 dashes "---" ;-)

v1: Fix to avoid return in case of error, per Richard's suggestion.
Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>

This signed-off-by line should be in the commit message, not the "version history" which is not included in the commit.

Apart from that (if you send a fixed v3) feel free to add
Reviewed-by: Richard Leitner <richard.leitner@xxxxxxxxxxx>

regards;Richard.L

---
drivers/usb/misc/usb251xb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 4d72b7d1d383..bbfdb7447d6f 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -612,7 +612,7 @@ static int usb251xb_probe(struct usb251xb *hub)
dev);
int err;
- if (np) {
+ if (np && of_id) {
err = usb251xb_get_ofdata(hub,
(struct usb251xb_data *)of_id->data);
if (err) {