drivers/block/drbd: Correct NULL test

Test the just-allocated value for NULL rather than some other value.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,y;
statement S;
@@

x = \(kmalloc\|kcalloc\|kzalloc\)(...);
(
if ((x) == NULL) S
|
if (
-   y
+   x
       == NULL)
 S
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index a6d266ee7e2ad9d7835cf30cb515b3f085c98b30..dbd451984e0de5d21f417544297adc8baf4e2ef2 100644 (file)
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3945,7 +3945,7 @@ static int drbd_do_auth(struct drbd_conf *mdev)
        }
 
        right_response = kmalloc(resp_size, GFP_NOIO);
-       if (response == NULL) {
+       if (right_response == NULL) {
                dev_err(DEV, "kmalloc of right_response failed\n");
                rv = 0;
                goto fail;