linux-kernel - Re: PROBLEM: Linux 5.4.237 i915 driver crashes on boot (-longterm regression)

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Message-ID: <ZBlf5RhMUCuM9LRD@kroah.com>
Date:   Tue, 21 Mar 2023 08:42:29 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Nick Bowler <nbowler@...conx.ca>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        John.C.Harrison@...el.com, regressions@...ts.linux.dev
Subject: Re: PROBLEM: Linux 5.4.237 i915 driver crashes on boot (-longterm
 regression)

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