[PATCH v2] drm/vblank: Fix for drivers that do not drm_vblank_init()

[Geert Uytterhoeven]

On Mon, Apr 3, 2023 at 6:07 PM Rob Clark <robdclark at gmail.com> wrote:
> From: Rob Clark <robdclark at chromium.org>
>
> This should fix a crash that was reported on ast (and possibly other
> drivers which do not initialize vblank).
>
>    fbcon: Taking over console
>    Unable to handle kernel NULL pointer dereference at virtual address 0000000000000074

Thanks, this fixes a crash seen with the ssd130x DRM driver.
Tested-by: Geert Uytterhoeven <geert+renesas at glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds