Put NULL test on the result of the previous call instead on one of its
arguments. A simplified version of the semantic match that finds this
problem is as follows (http://coccinelle.lip6.fr/):
// <smpl>
r@
expression *e1;
expression *e2;
identifier f;
statement S1,S2;
@@
e1 = f(...,e2,...);
(
if (e1 == NULL || ...) S1 else S2
|
*if (e2 == NULL || ...) S1 else S2
)
// </smpl>
Signed-off-by: Julia Lawall <julia.law...@lip6.fr>
---
drivers/staging/emxx_udc/emxx_udc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/emxx_udc/emxx_udc.c
b/drivers/staging/emxx_udc/emxx_udc.c
index fbf82bc..7de1e9e 100644
--- a/drivers/staging/emxx_udc/emxx_udc.c
+++ b/drivers/staging/emxx_udc/emxx_udc.c
@@ -2998,7 +2998,7 @@ static void nbu2ss_ep_fifo_flush(struct usb_ep *_ep)
}
ep = container_of(_ep, struct nbu2ss_ep, ep);
- if (!_ep) {
+ if (!ep) {
pr_err("udc: %s, bad ep\n", __func__);
return;
}
--
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