net: mediatek: add missing return code check

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 <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 4763252bbf8557ac98c73876e685d4b7413e3f43..11cd7304e4977138136709a84e21db6ddd66e199 100644 (file)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -495,6 +495,9 @@ 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);