Re: [PATCH v5 2/2] drm/ssd130x: Allocate buffer in the plane's .atomic_check() callback

[Javier Martinez Canillas <javierm@redhat.com>]

Javier Martinez Canillas <javierm@redhat.com> writes:

> Drivers are not allowed to fail after drm_atomic_helper_swap_state() has
> been called and the new atomic state is stored into the current sw state.
>
> Since the struct ssd130x_device .data_array is allocated in the encoder's
> .atomic_enable callback, the operation can fail and this is after the new
> state has been stored. So it can break an atomic mode settings assumption.
>
> Fix this by having custom helpers to allocate, duplicate and destroy the
> plane state, that will take care of allocating and freeing these buffers.
>
> Suggested-by: Maxime Ripard <mripard@kernel.org>
> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
> Acked-by: Maxime Ripard <mripard@kernel.org>
> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>

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

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat