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Date: Tue, 21 Mar 2023 08:42:29 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Nick Bowler <nbowler@draconx.ca>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	John.C.Harrison@intel.com, regressions@lists.linux.dev
Subject: Re: PROBLEM: Linux 5.4.237 i915 driver crashes on boot (-longterm
 regression)
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References: <CADyTPEyZCY1cnPsqcbMrgOZejtyHHSdZ=EStouKKBc8YKFrnkg@mail.gmail.com>
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On Tue, Mar 21, 2023 at 01:36:05AM -0400, Nick Bowler wrote:
> Hi,
> 
> Linux 5.4.237 crashes immediately on my machine every time when the i915
> driver is loaded, with an error like the one below.  Previous versions are OK.
> 
> I bisected it to commit 1aed78cfda7f ("drm/i915: Don't use BAR mappings
> for ring buffers with LLC").  I can revert this on top of 5.4.237 and
> this seems sufficient to make the machine boot and work again.
> 
> Let me know if you need any more info.

This should be fixed in the 5.4.238-rc1 release that is out for testing
right now, if not, please let me know.

thanks,

greg k-h