drm/drm_pci.c: Use dma_zalloc_coherent

Replace dma_alloc_coherent + memset with dma_zalloc_coherent.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181023040222.GA1540@jordon-HP-15-Notebook-PC

diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 48f615d..a9d9df6 100644 (file)
--- 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;