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From:   <sean.wang@mediatek.com>
To:     <vinod.koul@intel.com>, <dan.j.williams@intel.com>,
        <robh+dt@kernel.org>, <mark.rutland@arm.com>
CC:     <dmaengine@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>,
        Fengguang Wu <fengguang.wu@intel.com>,
        Sean Wang <sean.wang@mediatek.com>,
        Julia Lawall <julia.lawall@lip6.fr>
Subject: [PATCH v4 5/5] dmaengine: mediatek: fix zalloc-simple.cocci warnings
Date:   Fri, 9 Feb 2018 01:58:51 +0800
Message-ID: <ede5702c460a5b4b41186a8cff1e3c29b2380c08.1518110810.git.sean.wang@mediatek.com>
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From: Fengguang Wu <fengguang.wu@intel.com>

 Use zeroing allocator rather than allocator followed by memset with 0

Generated by: scripts/coccinelle/api/alloc/zalloc-simple.cocci

Fixes: c8e4b2e4ca21 ("dmaengine: mediatek: Add MediaTek High-Speed DMA controller for MT7622 and MT7623 SoC")
Cc: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 drivers/dma/mediatek/mtk-hsdma.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/mediatek/mtk-hsdma.c b/drivers/dma/mediatek/mtk-hsdma.c
index 42b5b23..d3b90fe 100644
--- a/drivers/dma/mediatek/mtk-hsdma.c
+++ b/drivers/dma/mediatek/mtk-hsdma.c
@@ -325,13 +325,11 @@ static int mtk_hsdma_alloc_pchan(struct mtk_hsdma_device *hsdma,
 	 * and [MTK_DMA_SIZE ... 2 * MTK_DMA_SIZE - 1] is for RX ring.
 	 */
 	pc->sz_ring = 2 * MTK_DMA_SIZE * sizeof(*ring->txd);
-	ring->txd = dma_alloc_coherent(hsdma2dev(hsdma),
-				       pc->sz_ring, &ring->tphys,
-				       GFP_ATOMIC | __GFP_ZERO);
+	ring->txd = dma_zalloc_coherent(hsdma2dev(hsdma), pc->sz_ring,
+					&ring->tphys, GFP_ATOMIC);
 	if (!ring->txd)
 		return -ENOMEM;
 
-	memset(ring->txd, 0, pc->sz_ring);
 	ring->rxd = &ring->txd[MTK_DMA_SIZE];
 	ring->rphys = ring->tphys + MTK_DMA_SIZE * sizeof(*ring->txd);
 	ring->cur_tptr = 0;
-- 
2.7.4