linux-kernel - [PATCH 1/2] dmaengine: k3dma: Use devm_kcalloc() in k3_dma

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Message-ID: <3f5acfa7-3c12-e8e1-17dd-ae03ce45c0be@users.sourceforge.net>
Date:   Sun, 23 Apr 2017 11:07:43 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     dmaengine@...r.kernel.org, Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Zhangfei Gao <zhangfei.gao@...aro.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/2] dmaengine: k3dma: Use devm_kcalloc() in k3_dma_probe()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 23 Apr 2017 10:30:32 +0200

* Multiplications for the size determination of memory allocations
  indicated that array data structures should be processed.
  Thus use the corresponding function "devm_kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of data structures by pointer dereferences
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/dma/k3dma.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index 01e25c68dd5a..31a51ee1a910 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -845,8 +845,8 @@ static int k3_dma_probe(struct platform_device *op)
 		return -ENOMEM;
 
 	/* init phy channel */
-	d->phy = devm_kzalloc(&op->dev,
-		d->dma_channels * sizeof(struct k3_dma_phy), GFP_KERNEL);
+	d->phy = devm_kcalloc(&op->dev, d->dma_channels, sizeof(*d->phy),
+			      GFP_KERNEL);
 	if (d->phy == NULL)
 		return -ENOMEM;
 
@@ -875,8 +875,8 @@ static int k3_dma_probe(struct platform_device *op)
 	d->slave.copy_align = DMAENGINE_ALIGN_8_BYTES;
 
 	/* init virtual channel */
-	d->chans = devm_kzalloc(&op->dev,
-		d->dma_requests * sizeof(struct k3_dma_chan), GFP_KERNEL);
+	d->chans = devm_kcalloc(&op->dev, d->dma_requests, sizeof(*d->chans),
+				GFP_KERNEL);
 	if (d->chans == NULL)
 		return -ENOMEM;
 
-- 
2.12.2