[PATCH] net: gro: use IS_ERR before PTR_ERR

[Guo Zhengkui]

fix following cocci warning:
./net/core/gro.c:493:5-12: ERROR: PTR_ERR applied after initialization to constant on line 441

Signed-off-by: Guo Zhengkui <guozhengkui@xxxxxxxx>
---
 net/core/gro.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/core/gro.c b/net/core/gro.c
index 8ec8b44596da..ee08f7b23793 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -490,9 +490,11 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
 	if (&ptype->list == head)
 		goto normal;
 
-	if (PTR_ERR(pp) == -EINPROGRESS) {
-		ret = GRO_CONSUMED;
-		goto ok;
+	if (IS_ERR(pp)) {
+		if (PTR_ERR(pp) == -EINPROGRESS) {
+			ret = GRO_CONSUMED;
+			goto ok;
+		}
 	}
 
 	same_flow = NAPI_GRO_CB(skb)->same_flow;
-- 
2.20.1