From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id AF870C433FE
	for <linux-kernel@archiver.kernel.org>; Sat,  2 Oct 2021 12:17:55 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by mail.kernel.org (Postfix) with ESMTP id 8FA0961B02
	for <linux-kernel@archiver.kernel.org>; Sat,  2 Oct 2021 12:17:55 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S233125AbhJBMTk (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Sat, 2 Oct 2021 08:19:40 -0400
Received: from mail.kernel.org ([198.145.29.99]:40448 "EHLO mail.kernel.org"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S233082AbhJBMTi (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Sat, 2 Oct 2021 08:19:38 -0400
Received: by mail.kernel.org (Postfix) with ESMTPSA id B56A661B00;
        Sat,  2 Oct 2021 12:17:52 +0000 (UTC)
Date:   Sat, 2 Oct 2021 08:17:50 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Hugh Dickins <hughd@google.com>
Cc:     Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>,
        Matt Roper <matthew.d.roper@intel.com>,
        Lucas De Marchi <lucas.demarchi@intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
        Caz Yokoyama <caz.yokoyama@intel.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        Matthew Brost <matthew.brost@intel.com>,
        intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: [BUG 5.15-rc3] kernel BUG at
 drivers/gpu/drm/i915/i915_sw_fence.c:245!
Message-ID: <20211002081750.7eec92dd@oasis.local.home>
In-Reply-To: <259ff554-76b8-8523-033-9e996f549c70@google.com>
References: <20211002020257.34a0e882@oasis.local.home>
        <259ff554-76b8-8523-033-9e996f549c70@google.com>
X-Mailer: Claws Mail 3.18.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Sat, 2 Oct 2021 03:17:29 -0700 (PDT)
Hugh Dickins <hughd@google.com> wrote:

> Yes (though bisection doesn't work right on this one): the fix

Interesting, as it appeared to be very reliable. But I didn't do the
"try before / after" on the patch.

> https://lore.kernel.org/lkml/1f955bff-fd9e-d2ee-132a-f758add9e9cb@google.com/
> seems to have got lost in the system: it has not even appeared in
> linux-next yet. I was going to send a reminder later this weekend.
> 
> Here it is again (but edited to replace "__aligned(4)" in the original
> by the official "__i915_sw_fence_call" I discovered afterwards; and
> ignoring recent discussions of where __attributes ought to appear :-)
> 
> 
> [PATCH] drm/i915: fix blank screen booting crashes

Thanks, I added it to my "fixes" patch set that I apply before testing.
It looks to have done the trick, and the kernel boots now.

Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

-- Steve