Thomas Zimmermann <tzimmermann@xxxxxxx> writes:
Hello Thomas,
> Always return the number of bytes read or written within the
> framebuffer. Only return an errno code if framebuffer memory
> was not touched. This is the semantics required by POSIX and
> makes fb_read() and fb_write() compatible with IGT tests. [1]
>
> This bug has been fixed for fb_write() long ago by
> commit 6a2a88668e90 ("[PATCH] fbdev: Fix return error of
> fb_write"). The code in fb_read() and the corresponding fb_sys_()
> helpers was forgotten.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Link: https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/blob/master/tests/fbdev.c # 1
> ---
The patch looks good to me and indeed the correct semantics AFAICT.
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat
