linux-kernel - Re: [PATCH v2] drm/bochs: downgrade pci_request

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Message-ID: <20200207123904.vvueifnbcfzlb7gx@sirius.home.kraxel.org>
Date:   Fri, 7 Feb 2020 13:39:04 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     dri-devel@...ts.freedesktop.org, marmarek@...isiblethingslab.com,
        David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR BOCHS VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH v2] drm/bochs: downgrade pci_request_region failure from
 error to warning

On Fri, Feb 07, 2020 at 01:06:00PM +0100, Thomas Zimmermann wrote:
> Hi
> 
> Am 07.02.20 um 12:57 schrieb Gerd Hoffmann:
> > Shutdown of firmware framebuffer has a bunch of problems.  Because
> > of this the framebuffer region might still be reserved even after
> > drm_fb_helper_remove_conflicting_pci_framebuffers() returned.
> 
> Out of curiosity: what's going wrong here?

Very short version: userspace keeping /dev/fb0 open delays
firmware framebuffer deinit.

Long version by Daniel Vetter:
https://www.spinics.net/lists/linux-fbdev/msg28178.html

cheers,
  Gerd