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From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Zhou Wang <wangzhou1@hisilicon.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc()
Date: Wed, 17 Jun 2020 16:11:35 -0500
Message-ID: <20200617211135.GA8660@embeddedor> (raw)

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/dma/hisi_dma.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
index ed3619266a48..e1a958ae7925 100644
--- a/drivers/dma/hisi_dma.c
+++ b/drivers/dma/hisi_dma.c
@@ -511,7 +511,6 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct device *dev = &pdev->dev;
 	struct hisi_dma_dev *hdma_dev;
 	struct dma_device *dma_dev;
-	size_t dev_size;
 	int ret;
 
 	ret = pcim_enable_device(pdev);
@@ -534,9 +533,7 @@ static int hisi_dma_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (ret)
 		return ret;
 
-	dev_size = sizeof(struct hisi_dma_chan) * HISI_DMA_CHAN_NUM +
-		   sizeof(*hdma_dev);
-	hdma_dev = devm_kzalloc(dev, dev_size, GFP_KERNEL);
+	hdma_dev = devm_kzalloc(dev, struct_size(hdma_dev, chan, HISI_DMA_CHAN_NUM), GFP_KERNEL);
 	if (!hdma_dev)
 		return -EINVAL;
 
-- 
2.27.0


             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-17 21:11 Gustavo A. R. Silva [this message]
2020-06-22  5:24 ` Zhou Wang
2020-06-24  5:56 ` Vinod Koul

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