drivers: use kzalloc/kcalloc instead of 'kmalloc+memset', where possible

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Tejun Heo <tj@kernel.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 10 insertions, 20 deletions

diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index b02c4ffa4db..0a9a774a7e1 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -1642,13 +1642,12 @@ static int sata_dwc_probe(struct platform_device *ofdev)
         const struct ata_port_info *ppi[] = { &pi, NULL };
 
         /* Allocate DWC SATA device */
-        hsdev = kmalloc(sizeof(*hsdev), GFP_KERNEL);
+        hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
         if (hsdev == NULL) {
                 dev_err(&ofdev->dev, "kmalloc failed for hsdev\n");
                 err = -ENOMEM;
                 goto error;
         }
-        memset(hsdev, 0, sizeof(*hsdev));
 
         /* Ioremap SATA registers */
         base = of_iomap(ofdev->dev.of_node, 0);
diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
index d15e09b0ae0..7525e0311e5 100644
--- a/drivers/gpu/drm/drm_scatter.c
+++ b/drivers/gpu/drm/drm_scatter.c
@@ -83,30 +83,26 @@ int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request)
         if (dev->sg)
                 return -EINVAL;
 
-        entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+        entry = kzalloc(sizeof(*entry), GFP_KERNEL);
         if (!entry)
                 return -ENOMEM;
 
-        memset(entry, 0, sizeof(*entry));
         pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
         DRM_DEBUG("size=%ld pages=%ld\n", request->size, pages);
 
         entry->pages = pages;
-        entry->pagelist = kmalloc(pages * sizeof(*entry->pagelist), GFP_KERNEL);
+        entry->pagelist = kcalloc(pages, sizeof(*entry->pagelist), GFP_KERNEL);
         if (!entry->pagelist) {
                 kfree(entry);
                 return -ENOMEM;
         }
 
-        memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
-
-        entry->busaddr = kmalloc(pages * sizeof(*entry->busaddr), GFP_KERNEL);
+        entry->busaddr = kcalloc(pages, sizeof(*entry->busaddr), GFP_KERNEL);
         if (!entry->busaddr) {
                 kfree(entry->pagelist);
                 kfree(entry);
                 return -ENOMEM;
         }
-        memset((void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr));
 
         entry->virtual = drm_vmalloc_dma(pages << PAGE_SHIFT);
         if (!entry->virtual) {
diff --git a/drivers/gpu/drm/radeon/radeon_mem.c b/drivers/gpu/drm/radeon/radeon_mem.c
index ed95155c4b1..988548efea9 100644
--- a/drivers/gpu/drm/radeon/radeon_mem.c
+++ b/drivers/gpu/drm/radeon/radeon_mem.c
@@ -139,7 +139,7 @@ static int init_heap(struct mem_block **heap, int start, int size)
         if (!blocks)
                 return -ENOMEM;
 
-        *heap = kmalloc(sizeof(**heap), GFP_KERNEL);
+        *heap = kzalloc(sizeof(**heap), GFP_KERNEL);
         if (!*heap) {
                 kfree(blocks);
                 return -ENOMEM;
@@ -150,7 +150,6 @@ static int init_heap(struct mem_block **heap, int start, int size)
         blocks->file_priv = NULL;
         blocks->next = blocks->prev = *heap;
 
-        memset(*heap, 0, sizeof(**heap));
         (*heap)->file_priv = (struct drm_file *) - 1;
         (*heap)->next = (*heap)->prev = blocks;
         return 0;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
index f1a52f9e729..07ce02da78a 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
@@ -585,11 +585,10 @@ int vmw_overlay_init(struct vmw_private *dev_priv)
                 return -ENOSYS;
         }
 
-        overlay = kmalloc(sizeof(*overlay), GFP_KERNEL);
+        overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
         if (!overlay)
                 return -ENOMEM;
 
-        memset(overlay, 0, sizeof(*overlay));
         mutex_init(&overlay->mutex);
         for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
                 overlay->stream[i].buf = NULL;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index 5408b1b7996..bfe1bcce7f8 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -612,11 +612,9 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
             srf->sizes[0].height == 64 &&
             srf->format == SVGA3D_A8R8G8B8) {
 
-                srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
-                /* clear the image */
-                if (srf->snooper.image) {
-                        memset(srf->snooper.image, 0x00, 64 * 64 * 4);
-                } else {
+                /* allocate image area and clear it */
+                srf->snooper.image = kzalloc(64 * 64 * 4, GFP_KERNEL);
+                if (!srf->snooper.image) {
                         DRM_ERROR("Failed to allocate cursor_image\n");
                         ret = -ENOMEM;
                         goto out_err1;
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index 8a1021f2e31..c72f1c0b5e6 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -1171,10 +1171,9 @@ static int vga_arb_open(struct inode *inode, struct file *file)
 
         pr_debug("%s\n", __func__);
 
-        priv = kmalloc(sizeof(struct vga_arb_private), GFP_KERNEL);
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
         if (priv == NULL)
                 return -ENOMEM;
-        memset(priv, 0, sizeof(*priv));
         spin_lock_init(&priv->lock);
         file->private_data = priv;