[PATCH 1/2] dmaengine: k3dma: Use devm_kcalloc() in k3_dma_probe()

From: SF Markus Elfring
Date: Sun Apr 23 2017 - 05:08:20 EST


From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxxxx>
---
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