[PATCH 02/12] net: mediatek: add missing return code check

[John Crispin]

The code fails to check if the scratch memory was properly allocated. Add
this check and return with an error if the allocation failed.

Signed-off-by: John Crispin <j...@phrozen.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c 
b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 45f8dbf..6780886 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -467,6 +467,9 @@ static int mtk_init_fq_dma(struct mtk_eth *eth)
 
        eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE,
                                    GFP_KERNEL);
+       if (unlikely(!eth->scratch_head))
+               return -ENOMEM;
+
        dma_addr = dma_map_single(eth->dev,
                                  eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE,
                                  DMA_FROM_DEVICE);
-- 
1.7.10.4