target/linux/mediatek/patches-4.4/0082-net-next-mediatek-add-missing-return-code-check.patch

   1 From 51ca1e9f141499fd7c95bff5401215b706656754 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Sat, 23 Apr 2016 09:06:05 +0200
   4 Subject: [PATCH 082/102] 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: Sean Wang <keyhaede@gmail.com>
  10 Signed-off-by: John Crispin <john@phrozen.org>
  11 ---
  12  drivers/net/ethernet/mediatek/mtk_eth_soc.c |    3 +++
  13  1 file changed, 3 insertions(+)
  14
  15 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  16 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  17 @@ -498,6 +498,9 @@ static int mtk_init_fq_dma(struct mtk_et
  18
  19         eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE,
  20                                     GFP_KERNEL);
  21 +       if (unlikely(!eth->scratch_head))
  22 +               return -ENOMEM;
  23 +
  24         dma_addr = dma_map_single(eth->dev,
  25                                   eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
  26                                   DMA_FROM_DEVICE);