[PATCH 2/6] fbdev: Use screen_buffer in fb_sys_{read,write}()

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann at suse.de> writes:

> Use info->screen_buffer when reading and writing framebuffers in
> system memory. It's the correct pointer for this address space.
>

Maybe can expand the explanation a little bit with something like this?

"The struct fb_info has a union to store the framebuffer memory. This can
either be info->screen_base if the framebuffer is stored in I/O memory,
or info->screen_buffer if the framebuffer is stored in system memory.

Since the fb_sys_{read,write}() functions operate on the latter address
space, it is wrong to use .screen_base and .screen_buffer must be used
instead. This also get rids of all the casting needed due not using the
correct data type."

> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> ---

Reviewed-by: Javier Martinez Canillas <javierm at redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat