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[media] uvcvideo: Use memdup_user() rather than duplicating its implementation

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Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Markus Elfring 2016-08-19 05:50:05 -03:00 committed by Mauro Carvalho Chehab
parent eb165a20df
commit 4cc5bed1ca
1 changed files with 3 additions and 8 deletions
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11
drivers/media/usb/uvc/uvc_v4l2.c
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@ -70,14 +70,9 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
}
size = xmap->menu_count * sizeof(*map->menu_info);
map->menu_info = kmalloc(size, GFP_KERNEL);
if (map->menu_info == NULL) {
ret = -ENOMEM;
goto done;
}
if (copy_from_user(map->menu_info, xmap->menu_info, size)) {
ret = -EFAULT;
map->menu_info = memdup_user(xmap->menu_info, size);
if (IS_ERR(map->menu_info)) {
ret = PTR_ERR(map->menu_info);
goto done;
}