From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEC6CC433EF for ; Mon, 9 May 2022 14:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236746AbiEIOOG (ORCPT ); Mon, 9 May 2022 10:14:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236692AbiEIOOE (ORCPT ); Mon, 9 May 2022 10:14:04 -0400 X-Greylist: delayed 460 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 09 May 2022 07:10:08 PDT Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0145D2B165A; Mon, 9 May 2022 07:10:08 -0700 (PDT) Received: from smtp202.mailbox.org (smtp202.mailbox.org [IPv6:2001:67c:2050:b231:465::202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4KxjXd4Q4kz9sSm; Mon, 9 May 2022 16:02:09 +0200 (CEST) From: public@timruffing.de To: Javier Martinez Canillas Cc: Thomas Zimmermann , Maxime Ripard , Daniel Vetter , Daniel Vetter , Helge Deller , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, public@timruffing.de Subject: Re: [PATCH v2] Revert "fbdev: Make fb_release() return -ENODEV if fbdev was unregistered" Date: Mon, 9 May 2022 16:01:49 +0200 Message-Id: <20220509140149.34734-1-public@timruffing.de> In-Reply-To: <642f515e-aa71-7c90-a715-e49dcf12baee@redhat.com> References: <642f515e-aa71-7c90-a715-e49dcf12baee@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks for this patch. Do you think this can be backported to LTS 5.17.y and 5.15.y, which are still buggy? It's not a big deal for me but others might profit. Background: The patch solves a regression from 5.17.1 to 5.17.2 or 5.15.32 and 5.15.33 I was about to report. On my Thinkpad T570, I got random "BUG", "Oops" or even panics when during booting with efifb and plymouthd (and then sometimes also problems when shutting down because). I had bisected the issue to commit 27599aacbaef. I could provide more info but I don't think it's necessary given that either aafa025c76dcc7d1a8c8f0bdefcbe4eb480b2f6a or your better patch now fixes the issue (I tested both, both work for me). Best, Tim Ruffing