* [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc()
@ 2020-06-17 21:11 Gustavo A. R. Silva
2020-06-22 5:24 ` Zhou Wang
2020-06-24 5:56 ` Vinod Koul
0 siblings, 2 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2020-06-17 21:11 UTC (permalink / raw)
To: Zhou Wang, Dan Williams, Vinod Koul
Cc: dmaengine, linux-kernel, Gustavo A. R. Silva
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
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc()
2020-06-17 21:11 [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc() Gustavo A. R. Silva
@ 2020-06-22 5:24 ` Zhou Wang
2020-06-24 5:56 ` Vinod Koul
1 sibling, 0 replies; 3+ messages in thread
From: Zhou Wang @ 2020-06-22 5:24 UTC (permalink / raw)
To: Gustavo A. R. Silva, Dan Williams, Vinod Koul
Cc: dmaengine, linux-kernel, Gustavo A. R. Silva
On 2020/6/18 5:11, Gustavo A. R. Silva wrote:
> 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>
Looks good to me, thanks!
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
> ---
> 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;
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc()
2020-06-17 21:11 [PATCH][next] dmaengine: hisilicon: Use struct_size() in devm_kzalloc() Gustavo A. R. Silva
2020-06-22 5:24 ` Zhou Wang
@ 2020-06-24 5:56 ` Vinod Koul
1 sibling, 0 replies; 3+ messages in thread
From: Vinod Koul @ 2020-06-24 5:56 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Zhou Wang, Dan Williams, dmaengine, linux-kernel, Gustavo A. R. Silva
On 17-06-20, 16:11, Gustavo A. R. Silva wrote:
> 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.
Applied, thanks
--
~Vinod
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-06-22 5:24 ` Zhou Wang
2020-06-24 5:56 ` Vinod Koul
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