target/linux/mediatek/patches-4.4/0083-net-next-mediatek-add-missing-return-code-check.patch

   1 From d20b45f50d6b3352aa7be76eb7a28cffcfe379da Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sat, 23 Apr 2016 09:06:05 +0200
   4 Subject: [PATCH 83/91] net-next: mediatek: add missing return code check
   5
   6 The code fails to check if the scratch memory was properly allocated. Add
   7 this check and return with an error if the allocation failed.
   8
   9 Signed-off-by: John Crispin <blogic@openwrt.org>
  10 ---
  11  drivers/net/ethernet/mediatek/mtk_eth_soc.c |    3 +++
  12  1 file changed, 3 insertions(+)
  13
  14 diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  15 index aa25788..e58a634 100644
  16 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  17 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  18 @@ -483,6 +483,9 @@ static int mtk_init_fq_dma(struct mtk_eth *eth)
  19
  20         eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE,
  21                                     GFP_KERNEL);
  22 +       if (unlikely(!eth->scratch_head))
  23 +               return -ENOMEM;
  24 +
  25         dma_addr = dma_map_single(eth->dev,
  26                                   eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
  27                                   DMA_FROM_DEVICE);
  28 --
  29 1.7.10.4
  30