Oct 23 2012

[media] pwc: Replace memcpy with struct assignment 

Author: Ezequiel Garcia <elezegarcia@gmail.com>

This kind of memcpy() is error-prone. Its replacement with a struct
assignment is prefered because it's type-safe and much easier to read.
Found by coccinelle. Hand patched and reviewed.
Tested by compilation only.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// 
@@
identifier struct_name;
struct struct_name to;
struct struct_name from;
expression E;
@@
-memcpy(&(to), &(from), E);
+to = from;
// 

Signed-off-by: Peter Senna Tschudin 
Signed-off-by: Ezequiel Garcia 
Signed-off-by: Mauro Carvalho Chehab 

---
 drivers/media/usb/pwc/pwc-if.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c
index 21c1523..5ec15cb 100644
--- a/drivers/media/usb/pwc/pwc-if.c
+++ b/drivers/media/usb/pwc/pwc-if.c
@@ -1008,7 +1008,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 	}
 
 	/* Init video_device structure */
-	memcpy(&pdev->vdev, &pwc_template, sizeof(pwc_template));
+	pdev->vdev = pwc_template;
 	strcpy(pdev->vdev.name, name);
 	pdev->vdev.queue = &pdev->vb_queue;
 	pdev->vdev.queue->lock = &pdev->vb_queue_lock;

qlambert