[PATCH] [media] pwc: Use kmemdup rather than duplicating itsimplementation

[Thomas Meyer]

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@xxxxxxxx>
---

diff -u -p a/drivers/media/video/pwc/pwc-ctrl.c b/drivers/media/video/pwc/pwc-ctrl.c
--- a/drivers/media/video/pwc/pwc-ctrl.c 2011-11-07 19:37:51.143333699 +0100
+++ b/drivers/media/video/pwc/pwc-ctrl.c 2011-11-08 10:47:00.679677247 +0100
@@ -113,10 +113,9 @@ static int _send_control_msg(struct pwc_
 	void *kbuf = NULL;
 
 	if (buflen) {
-		kbuf = kmalloc(buflen, GFP_KERNEL); /* not allowed on stack */
+		kbuf = kmemdup(buf, buflen, GFP_KERNEL); /* not allowed on stack */
 		if (kbuf == NULL)
 			return -ENOMEM;
-		memcpy(kbuf, buf, buflen);
 	}
 
 	rc = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
--
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