Re: [PATCH] Revert "fbdev: Remove conflicting devices on PCI bus"

From: Bjorn Helgaas <helgaas@kernel.org>
To: Dave Airlie <airlied@gmail.com>
Cc: linux-fbdev@vger.kernel.org, linux-pci@vger.kernel.org,
	Helge Deller <deller@gmx.de>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Javier Martinez Canillas <javierm@redhat.com>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Zeno Davatz <zdavatz@gmail.com>
Subject: Re: [PATCH] Revert "fbdev: Remove conflicting devices on PCI bus"
Date: Mon, 6 Feb 2023 09:56:49 -0600	[thread overview]
Message-ID: <20230206155649.GA2212009@bhelgaas> (raw)
In-Reply-To: <CAPM=9twrKFPkEXTFWousnmJoH-mEG1KvGEBwqYY2e0biw-h8bw@mail.gmail.com>

On Mon, Feb 06, 2023 at 06:59:40AM +1000, Dave Airlie wrote:
> On Sat, 4 Feb 2023 at 09:09, Bjorn Helgaas <helgaas@kernel.org> wrote:
> > From: Bjorn Helgaas <bhelgaas@google.com>
> >
> > This reverts commit 145eed48de278007f646b908fd70ac59d24ed81a.
> >
> > Zeno Davatz reported that 145eed48de27 ("fbdev: Remove conflicting devices
> > on PCI bus") caused a console hang.  The machine was actually still usable
> > via ssh, etc., but there was no activity on the console.
> >
> > Reverting 145eed48de27 for the nvidiafb on that system fixed the problem.
> >
> > Revert 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus") since
> > we don't know what caused the problem.
> 
> Why is the user using nvidiafb?

I don't know, and of course, it really doesn't matter; we shouldn't
regress a user's experience, and there's no hint to the user of where
to look for a resolution.

Thanks for working out a better fix!

Bjorn