From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 30 May 2018 15:09:16 +0000 (+0100)
Subject: bpf: devmap: remove redundant assignment of dev = dev
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=71b2c87df3ac37f5f83e166db136b0c1d065a781;p=openwrt%2Fstaging%2Fblogic.git

bpf: devmap: remove redundant assignment of dev = dev

The assignment dev = dev is redundant and should be removed.

Detected by CoverityScan, CID#1469486 ("Evaluation order violation")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index ae16d0c373ef..1fe3fe60508a 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -352,7 +352,7 @@ int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
 static void *dev_map_lookup_elem(struct bpf_map *map, void *key)
 {
 	struct bpf_dtab_netdev *obj = __dev_map_lookup_elem(map, *(u32 *)key);
-	struct net_device *dev = dev = obj ? obj->dev : NULL;
+	struct net_device *dev = obj ? obj->dev : NULL;
 
 	return dev ? &dev->ifindex : NULL;
 }