[PATCH] drivers/media/video/v4l2-compat-ioctl32.c: Check the return value of copy_to_user

[Thiago Farina]

This fix the following warning:
drivers/media/video/v4l2-compat-ioctl32.c: In function âget_microcode32â:
drivers/media/video/v4l2-compat-ioctl32.c:209: warning: ignoring return value of âcopy_to_userâ, declared with attribute warn_unused_result

Signed-off-by: Thiago Farina <tfransosi@xxxxxxxxx>
---
 drivers/media/video/v4l2-compat-ioctl32.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c
index e30e8df..55825ec 100644
--- a/drivers/media/video/v4l2-compat-ioctl32.c
+++ b/drivers/media/video/v4l2-compat-ioctl32.c
@@ -206,7 +206,9 @@ static struct video_code __user *get_microcode32(struct video_code32 *kp)
 	 * user address is invalid, the native ioctl will do
 	 * the error handling for us
 	 */
-	(void) copy_to_user(up->loadwhat, kp->loadwhat, sizeof(up->loadwhat));
+	if (copy_to_user(up->loadwhat, kp->loadwhat, sizeof(up->loadwhat)))
+		return NULL;
+
 	(void) put_user(kp->datasize, &up->datasize);
 	(void) put_user(compat_ptr(kp->data), &up->data);
 	return up;
-- 
1.7.3.2.343.g7d43d

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