From 562c5a70400c75f50d99de631666ac7cc2f03958 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Fri, 10 Jun 2016 13:27:58 +0200
Subject: 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 4763252..11cd730 100644
--- 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);
-- 
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