linux-kernel - [PATCH 1/2] media: ipu3-cio2: Use dma_zalloc_coherent to replace dma_alloc

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Date:   Sat, 18 Aug 2018 23:16:54 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <yong.zhi@...el.com>, <sakari.ailus@...ux.intel.com>,
        <bingbu.cao@...el.com>, <mchehab@...nel.org>,
        <matthias.bgg@...il.com>
CC:     <tian.shu.qiu@...el.com>, <jian.xu.zheng@...el.com>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>
Subject: [PATCH 1/2] media: ipu3-cio2: Use dma_zalloc_coherent to replace dma_alloc_coherent + memset

dma_zalloc_coherent has implemented the dma_alloc_coherent() + memset(),
We prefer to dma_zalloc_coherent instead of open-codeing.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 drivers/media/pci/intel/ipu3/ipu3-cio2.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
index 2902715..f0c6374 100644
--- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c
+++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
@@ -218,13 +218,11 @@ static int cio2_fbpt_init(struct cio2_device *cio2, struct cio2_queue *q)
 {
 	struct device *dev = &cio2->pci_dev->dev;
 
-	q->fbpt = dma_alloc_coherent(dev, CIO2_FBPT_SIZE, &q->fbpt_bus_addr,
-				     GFP_KERNEL);
+	q->fbpt = dma_zalloc_coherent(dev, CIO2_FBPT_SIZE, &q->fbpt_bus_addr,
+				      GFP_KERNEL);
 	if (!q->fbpt)
 		return -ENOMEM;
 
-	memset(q->fbpt, 0, CIO2_FBPT_SIZE);
-
 	return 0;
 }
 
-- 
1.7.12.4