Re: [PATCH] media: fix uninitialized variable warning in dib0700_rc_urb_completion()

Sean Young
2016-11-08T11:23:48Z

On Mon, Nov 07, 2016 at 08:41:12AM -0700, Shuah Khan wrote:
> Fix the following uninitialized variable compiler warning:
>
> drivers/media/usb/dvb-usb/dib0700_core.c: In function ‘dib0700_rc_urb_completion’:
> drivers/media/usb/dvb-usb/dib0700_core.c:763:2: warning: ‘protocol’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> rc_keydown(d->rc_dev, protocol, keycode, toggle);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
> ---
> drivers/media/usb/dvb-usb/dib0700_core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/dvb-usb/dib0700_core.c b/drivers/media/usb/dvb-usb/dib0700_core.c
> index f319665..cfe28ec 100644
> --- a/drivers/media/usb/dvb-usb/dib0700_core.c
> +++ b/drivers/media/usb/dvb-usb/dib0700_core.c
> @@ -676,7 +676,7 @@ static void dib0700_rc_urb_completion(struct urb *purb)
> {
> struct dvb_usb_device *d = purb->context;
> struct dib0700_rc_response *poll_reply;
> - enum rc_type protocol;
> + enum rc_type protocol = RC_TYPE_UNKNOWN;
> u32 uninitialized_var(keycode);
> u8 toggle;
>

There is another (better) fix for it here:

https://patchwork.linuxtv.org/patch/37516/

Thanks
Sean