drivers/staging/mt7621-eth: Use dma_zalloc_coherent to replace dma_alloc_coherent...

we prefer to use dma_zalloc_coherent rather than dam_alloc_coherent+memset

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/mt7621-eth/mtk_eth_soc.c b/drivers/staging/mt7621-eth/mtk_eth_soc.c
index f9b593ca2bcf7d5b885525292e3a7f2fbf70e444..7135075585687f0651e17d661efeaa307b738019 100644 (file)
--- a/drivers/staging/mt7621-eth/mtk_eth_soc.c
+++ b/drivers/staging/mt7621-eth/mtk_eth_soc.c
@@ -1396,14 +1396,13 @@ static int mtk_qdma_tx_alloc_tx(struct mtk_eth *eth)
        if (!ring->tx_buf)
                goto no_tx_mem;
 
-       ring->tx_dma = dma_alloc_coherent(eth->dev,
+       ring->tx_dma = dma_zalloc_coherent(eth->dev,
                                          ring->tx_ring_size * sz,
                                          &ring->tx_phys,
                                          GFP_ATOMIC | __GFP_ZERO);
        if (!ring->tx_dma)
                goto no_tx_mem;
 
-       memset(ring->tx_dma, 0, ring->tx_ring_size * sz);
        for (i = 0; i < ring->tx_ring_size; i++) {
                int next = (i + 1) % ring->tx_ring_size;
                u32 next_ptr = ring->tx_phys + next * sz;