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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

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