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net: mediatek: use dma_zalloc_coherent instead of allocator/memset

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Use dma_zalloc_coherent instead of dma_alloc_coherent
followed by memset 0.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YueHaibing 2018-07-23 11:16:47 +08:00 committed by David S. Miller
parent 07300f774f
commit 0a78c3803d
1 changed files with 2 additions and 5 deletions
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7
drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@ -1221,14 +1221,11 @@ static int mtk_tx_alloc(struct mtk_eth *eth)
if (!ring->buf)
goto no_tx_mem;
ring->dma = dma_alloc_coherent(eth->dev,
MTK_DMA_SIZE * sz,
&ring->phys,
GFP_ATOMIC | __GFP_ZERO);
ring->dma = dma_zalloc_coherent(eth->dev, MTK_DMA_SIZE * sz,
&ring->phys, GFP_ATOMIC);
if (!ring->dma)
goto no_tx_mem;
memset(ring->dma, 0, MTK_DMA_SIZE * sz);
for (i = 0; i < MTK_DMA_SIZE; i++) {
int next = (i + 1) % MTK_DMA_SIZE;
u32 next_ptr = ring->phys + next * sz;