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bgmac: fix a missing check for build_skb 

when build_skb failed, it may occure a NULL pointer.
So add a 'NULL check' for it.

Signed-off-by: Weidong Wang <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
wangweidong 2016-01-13 11:06:41 +08:00 committed by David S. Miller
parent ddb5388ffd
commit f1640c3dde
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/broadcom/bgmac.c
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@ -466,6 +466,11 @@ static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
len -= ETH_FCS_LEN;
skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
if (unlikely(skb)) {
bgmac_err(bgmac, "build_skb failed\n");
put_page(virt_to_head_page(buf));
break;
}
skb_put(skb, BGMAC_RX_FRAME_OFFSET +
BGMAC_RX_BUF_OFFSET + len);
skb_pull(skb, BGMAC_RX_FRAME_OFFSET +