[PATCH] drm/drm_pci.c: Use dma_zalloc_coherent

[PATCH] drm/drm_pci.c: Use dma_zalloc_coherent

[Souptick Joarder]

Replace dma_alloc_coherent + memset with dma_zalloc_coherent.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
---
 drivers/gpu/drm/drm_pci.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 896e42a..1427879 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -61,15 +61,14 @@ drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t ali
 		return NULL;
 
 	dmah->size = size;
-	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
+	dmah->vaddr = dma_zalloc_coherent(&dev->pdev->dev, size, &dmah->busaddr,
+						GFP_KERNEL | __GFP_COMP);
 
 	if (dmah->vaddr == NULL) {
 		kfree(dmah);
 		return NULL;
 	}
 
-	memset(dmah->vaddr, 0, size);
-
 	/* XXX - Is virt_to_page() legal for consistent mem? */
 	/* Reserve */
 	for (addr = (unsigned long)dmah->vaddr, sz = size;
-- 
1.9.1

Re: [PATCH] drm/drm_pci.c: Use dma_zalloc_coherent

[Daniel Vetter]

On Tue, Oct 23, 2018 at 09:32:22AM +0530, Souptick Joarder wrote:
> Replace dma_alloc_coherent + memset with dma_zalloc_coherent.
> 
> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>

Applied, thanks for your patch.
-Daniel

> ---
>  drivers/gpu/drm/drm_pci.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
> index 896e42a..1427879 100644
> --- a/drivers/gpu/drm/drm_pci.c
> +++ b/drivers/gpu/drm/drm_pci.c
> @@ -61,15 +61,14 @@ drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t ali
>  		return NULL;
>  
>  	dmah->size = size;
> -	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
> +	dmah->vaddr = dma_zalloc_coherent(&dev->pdev->dev, size, &dmah->busaddr,
> +						GFP_KERNEL | __GFP_COMP);
>  
>  	if (dmah->vaddr == NULL) {
>  		kfree(dmah);
>  		return NULL;
>  	}
>  
> -	memset(dmah->vaddr, 0, size);
> -
>  	/* XXX - Is virt_to_page() legal for consistent mem? */
>  	/* Reserve */
>  	for (addr = (unsigned long)dmah->vaddr, sz = size;
> -- 
> 1.9.1
> 
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> dri-devel@lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch