[PATCH] arch/sh/mm/consistent.c: Use dma_zalloc_coherent

[PATCH] arch/sh/mm/consistent.c: Use dma_zalloc_coherent

[Sabyasachi Gupta]

Replaced dma_alloc_coherent + memset with dma_zalloc_coherant

Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
---
 arch/sh/mm/consistent.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 792f361..fc8d235 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -52,13 +52,12 @@ int __init platform_resource_setup_memory(struct platform_device *pdev,
 	if (!memsize)
 		return 0;
 
-	buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
+	buf = dma_zalloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
 	if (!buf) {
 		pr_warning("%s: unable to allocate memory\n", name);
 		return -ENOMEM;
 	}
 
-	memset(buf, 0, memsize);
 
 	r->flags = IORESOURCE_MEM;
 	r->start = dma_handle;
-- 
2.7.4

Re: [PATCH] arch/sh/mm/consistent.c: Use dma_zalloc_coherent

[Souptick Joarder]

On Sun, Oct 28, 2018 at 12:29 PM Sabyasachi Gupta
<sabyasachi.linux@gmail.com> wrote:
>
> Replaced dma_alloc_coherent + memset with dma_zalloc_coherant
>
> Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>

Acked-by: Souptick Joarder <jrdr.linux@gmail.com>

> ---
>  arch/sh/mm/consistent.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
> index 792f361..fc8d235 100644
> --- a/arch/sh/mm/consistent.c
> +++ b/arch/sh/mm/consistent.c
> @@ -52,13 +52,12 @@ int __init platform_resource_setup_memory(struct platform_device *pdev,
>         if (!memsize)
>                 return 0;
>
> -       buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
> +       buf = dma_zalloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
>         if (!buf) {
>                 pr_warning("%s: unable to allocate memory\n", name);
>                 return -ENOMEM;
>         }
>
> -       memset(buf, 0, memsize);
>
>         r->flags = IORESOURCE_MEM;
>         r->start = dma_handle;
> --
> 2.7.4
>

Re: [PATCH] arch/sh/mm/consistent.c: Use dma_zalloc_coherent

[Robin Murphy]

On 28/10/2018 06:58, Sabyasachi Gupta wrote:
> Replaced dma_alloc_coherent + memset with dma_zalloc_coherant

Please take a look at linux-next where we've already phased out
dma_zalloc_coherent(). The memset() should still be redundant and worth
cleaning up, though.

Thanks,
Robin.

> Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
> ---
>   arch/sh/mm/consistent.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
> index 792f361..fc8d235 100644
> --- a/arch/sh/mm/consistent.c
> +++ b/arch/sh/mm/consistent.c
> @@ -52,13 +52,12 @@ int __init platform_resource_setup_memory(struct platform_device *pdev,
>   if (!memsize)
>   return 0;
>
> -buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
> +buf = dma_zalloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
>   if (!buf) {
>   pr_warning("%s: unable to allocate memory\n", name);
>   return -ENOMEM;
>   }
>
> -memset(buf, 0, memsize);
>
>   r->flags = IORESOURCE_MEM;
>   r->start = dma_handle;
>
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