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From d20b45f50d6b3352aa7be76eb7a28cffcfe379da Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sat, 23 Apr 2016 09:06:05 +0200
Subject: [PATCH 83/91] net-next: 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 <blogic@openwrt.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 aa25788..e58a634 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -483,6 +483,9 @@ 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
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