Re: [PATCH] drm/ssd130x: Silence a `dubious: x & !y` warning

From: Javier Martinez Canillas
Date: Tue Jan 24 2023 - 05:11:42 EST


On 1/21/23 20:09, Javier Martinez Canillas wrote:
> The sparse tool complains with the following warning:
>
> $ make M=drivers/gpu/drm/solomon/ C=2
> CC [M] drivers/gpu/drm/solomon/ssd130x.o
> CHECK drivers/gpu/drm/solomon/ssd130x.c
> drivers/gpu/drm/solomon/ssd130x.c:363:21: warning: dubious: x & !y
>
> This seems to be a false positive in my opinion but still we can silence
> the tool while making the code easier to read. Let's also add a comment,
> to explain why the "com_seq" logical not is used rather than its value.
>
> Reported-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
> Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> ---
>

Pushed this to drm-misc (drm-misc-next). Thanks!

--
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat