linux-kernel - Re: [PATCH] fbdev: fbmem: Fix logo center image dx issue

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Date:   Thu, 30 Jun 2022 08:51:45 +0200
From:   Helge Deller <deller@....de>
To:     Guiling Deng <greens9@....com>, daniel@...ll.ch
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fbdev: fbmem: Fix logo center image dx issue

On 6/28/22 18:36, Guiling Deng wrote:
> Image.dx gets wrong value because of missing '()'.
>
> If xres == logo->width and n == 1, image.dx = -16.
>
> Signed-off-by: Guiling Deng <greens9@....com>

Nice catch!

applied to the fbdev tree.

Thanks,
Helge

> ---
>  drivers/video/fbdev/core/fbmem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
> index c4a18322dee9..1fd2bdb11266 100644
> --- a/drivers/video/fbdev/core/fbmem.c
> +++ b/drivers/video/fbdev/core/fbmem.c
> @@ -511,7 +511,7 @@ static int fb_show_logo_line(struct fb_info *info, int rotate,
>
>  		while (n && (n * (logo->width + 8) - 8 > xres))
>  			--n;
> -		image.dx = (xres - n * (logo->width + 8) - 8) / 2;
> +		image.dx = (xres - (n * (logo->width + 8) - 8)) / 2;
>  		image.dy = y ?: (yres - logo->height) / 2;
>  	} else {
>  		image.dx = 0;