Staging: Use kcalloc or kzalloc

Use kcalloc or kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,y,flags;
statement S;
type T;
@@

x =
-   kmalloc
+   kcalloc
           (
-           y * sizeof(T),
+           y, sizeof(T),
                flags);
 if (x == NULL) S
-memset(x, 0, y * sizeof(T));

@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

1 files changed, 4 insertions, 8 deletions

diff --git a/drivers/staging/go7007/go7007-fw.c b/drivers/staging/go7007/go7007-fw.c
index ee622ff..c9a6409 100644
--- a/drivers/staging/go7007/go7007-fw.c
+++ b/drivers/staging/go7007/go7007-fw.c
@@ -380,13 +380,12 @@ static int gen_mjpeghdr_to_package(struct go7007 *go, __le16 *code, int space)
 	unsigned int addr = 0x19;
 	int size = 0, i, off = 0, chunk;
 
-	buf = kmalloc(4096, GFP_KERNEL);
+	buf = kzalloc(4096, GFP_KERNEL);
 	if (buf == NULL) {
 		printk(KERN_ERR "go7007: unable to allocate 4096 bytes for "
 				"firmware construction\n");
 		return -1;
 	}
-	memset(buf, 0, 4096);
 
 	for (i = 1; i < 32; ++i) {
 		mjpeg_frame_header(go, buf + size, i);
@@ -651,13 +650,12 @@ static int gen_mpeg1hdr_to_package(struct go7007 *go,
 	unsigned int addr = 0x19;
 	int i, off = 0, chunk;
 
-	buf = kmalloc(5120, GFP_KERNEL);
+	buf = kzalloc(5120, GFP_KERNEL);
 	if (buf == NULL) {
 		printk(KERN_ERR "go7007: unable to allocate 5120 bytes for "
 				"firmware construction\n");
 		return -1;
 	}
-	memset(buf, 0, 5120);
 	framelen[0] = mpeg1_frame_header(go, buf, 0, 1, PFRAME);
 	if (go->interlace_coding)
 		framelen[0] += mpeg1_frame_header(go, buf + framelen[0] / 8,
@@ -839,13 +837,12 @@ static int gen_mpeg4hdr_to_package(struct go7007 *go,
 	unsigned int addr = 0x19;
 	int i, off = 0, chunk;
 
-	buf = kmalloc(5120, GFP_KERNEL);
+	buf = kzalloc(5120, GFP_KERNEL);
 	if (buf == NULL) {
 		printk(KERN_ERR "go7007: unable to allocate 5120 bytes for "
 				"firmware construction\n");
 		return -1;
 	}
-	memset(buf, 0, 5120);
 	framelen[0] = mpeg4_frame_header(go, buf, 0, PFRAME);
 	i = 368;
 	framelen[1] = mpeg4_frame_header(go, buf + i, 0, BFRAME_PRE);
@@ -1585,13 +1582,12 @@ int go7007_construct_fw_image(struct go7007 *go, u8 **fw, int *fwlen)
 			go->board_info->firmware);
 		return -1;
 	}
-	code = kmalloc(codespace * 2, GFP_KERNEL);
+	code = kzalloc(codespace * 2, GFP_KERNEL);
 	if (code == NULL) {
 		printk(KERN_ERR "go7007: unable to allocate %d bytes for "
 				"firmware construction\n", codespace * 2);
 		goto fw_failed;
 	}
-	memset(code, 0, codespace * 2);
 	src = (__le16 *)fw_entry->data;
 	srclen = fw_entry->size / 2;
 	while (srclen >= 2) {