linux-kernel - [PATCH] drm/drm_pci.c: Use dma_zalloc

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Date:   Tue, 23 Oct 2018 09:32:22 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     gustavo@...ovan.org, maarten.lankhorst@...ux.intel.com,
        sean@...rly.run, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        sabyasachi.linux@...il.com, brajeswar.linux@...il.com
Subject: [PATCH] drm/drm_pci.c: Use dma_zalloc_coherent

Replace dma_alloc_coherent + memset with dma_zalloc_coherent.

Signed-off-by: Souptick Joarder <jrdr.linux@...il.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