From patchwork Mon May 16 19:36:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573791 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 210B0C433FE for ; Mon, 16 May 2022 19:56:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346764AbiEPTzr (ORCPT ); Mon, 16 May 2022 15:55:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347037AbiEPTvf (ORCPT ); Mon, 16 May 2022 15:51:35 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8EEF028A; Mon, 16 May 2022 12:46:47 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2D414609D0; Mon, 16 May 2022 19:46:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A154C385AA; Mon, 16 May 2022 19:46:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652730406; bh=pBZPEgcwSWzTvVDiYZyVpK3hnXuf2CTVNp7A4sC+rao=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LayEnuD8R2isTzh0OoNoARX4xHZPRg+BuTu5qcNdQ4P8C8vfdaCBYomtOWfsWy02y MjgxmcxTScJVT+ucUZXwMlQS9naLlYdKHuNtx+siU3hB8efJ89dQhFbn4izM9rwtkO 0qA/JYCo604w5vmB06tfd62koznTGvZMSuzGatCo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jordan Leppert , Holger Hoffstaette , Manuel Ullmann , Paolo Abeni Subject: [PATCH 5.10 55/66] net: atlantic: always deep reset on pm op, fixing up my null deref regression Date: Mon, 16 May 2022 21:36:55 +0200 Message-Id: <20220516193621.001311470@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193619.400083785@linuxfoundation.org> References: <20220516193619.400083785@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Manuel Ullmann commit 1809c30b6e5a83a1de1435fe01aaa4de4d626a7c upstream. The impact of this regression is the same for resume that I saw on thaw: the kernel hangs and nothing except SysRq rebooting can be done. Fixes regression in commit cbe6c3a8f8f4 ("net: atlantic: invert deep par in pm functions, preventing null derefs"), where I disabled deep pm resets in suspend and resume, trying to make sense of the atl_resume_common() deep parameter in the first place. It turns out, that atlantic always has to deep reset on pm operations. Even though I expected that and tested resume, I screwed up by kexec-rebooting into an unpatched kernel, thus missing the breakage. This fixup obsoletes the deep parameter of atl_resume_common, but I leave the cleanup for the maintainers to post to mainline. Suspend and hibernation were successfully tested by the reporters. Fixes: cbe6c3a8f8f4 ("net: atlantic: invert deep par in pm functions, preventing null derefs") Link: https://lore.kernel.org/regressions/9-Ehc_xXSwdXcvZqKD5aSqsqeNj5Izco4MYEwnx5cySXVEc9-x_WC4C3kAoCqNTi-H38frroUK17iobNVnkLtW36V6VWGSQEOHXhmVMm5iQ=@protonmail.com/ Reported-by: Jordan Leppert Reported-by: Holger Hoffstaette Tested-by: Jordan Leppert Tested-by: Holger Hoffstaette CC: # 5.10+ Signed-off-by: Manuel Ullmann Link: https://lore.kernel.org/r/87bkw8dfmp.fsf@posteo.de Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c @@ -455,7 +455,7 @@ static int aq_pm_freeze(struct device *d static int aq_pm_suspend_poweroff(struct device *dev) { - return aq_suspend_common(dev, false); + return aq_suspend_common(dev, true); } static int aq_pm_thaw(struct device *dev) @@ -465,7 +465,7 @@ static int aq_pm_thaw(struct device *dev static int aq_pm_resume_restore(struct device *dev) { - return atl_resume_common(dev, false); + return atl_resume_common(dev, true); } static const struct dev_pm_ops aq_pm_ops = {