Re: [PATCH v2] Revert "fbdev: Make fb_release() return -ENODEV if fbdev was unregistered"

[Javier Martinez Canillas]

Hello Tim,

On 5/9/22 16:01, public@xxxxxxxxxxxxx wrote:
> Thanks for this patch. Do you think this can be backported to LTS 5.17.y and

You are welcome.

> 5.15.y, which are still buggy? It's not a big deal for me but others might
> profit.
>
> Background:
> The patch solves a regression from 5.17.1 to 5.17.2 or 5.15.32 and
> 5.15.33 I was about to report. On my Thinkpad T570, I got random "BUG", "Oops"
> or even panics when during booting with efifb and plymouthd (and then sometimes
> also problems when shutting down because). I had bisected the issue to commit
> 27599aacbaef. I could provide more info but I don't think it's necessary given
> that either aafa025c76dcc7d1a8c8f0bdefcbe4eb480b2f6a or your better patch now
> fixes the issue (I tested both, both work for me).
>

The patches to fix the fbdev hot-unplug regression will get merged in mainline
soon and since all have a Fixes tag, they should get picked for stable as well.

-- 
Best regards,

Javier Martinez Canillas
Linux Engineering
Red Hat