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media: fix uninitialized variable warning in dib0700_rc_urb_completion()

Message ID 20161107154114.26803-2-shuahkh@osg.samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Shuah Khan Nov. 7, 2016, 3:41 p.m. UTC
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(-)

Comments

Sean Young Nov. 8, 2016, 11:23 a.m. UTC | #1
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
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diff mbox

Patch

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;