From patchwork Mon Mar 15 13:53:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 401276 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79412C2BB84 for ; Mon, 15 Mar 2021 14:06:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F5DD64E83 for ; Mon, 15 Mar 2021 14:06:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232030AbhCOOF5 (ORCPT ); Mon, 15 Mar 2021 10:05:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:35446 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233278AbhCOOBV (ORCPT ); Mon, 15 Mar 2021 10:01:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A978664F19; Mon, 15 Mar 2021 14:00:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816857; bh=0/7THb51rLr6O46ogVRC0HvZOZOkuhi8Nh008It35pg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qW82SmFGQZawmw8m3eWVvdBD2isDLqp5g2kcUqRvWNAboLowRtJLd6sCMLBKONUIa sjKEN+rUdwWd+Ycw5jnfc4nmFv9Wk4C89By9pGNrjDW6nRAcwLvIM1tJjJmuKfUeaI zvR9sgi5bbjhowSpvStdPNzBanL/1DafFnHkID0g= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai , Abhishek Sahu Subject: [PATCH 5.11 165/306] ALSA: hda/hdmi: Cancel pending works before suspend Date: Mon, 15 Mar 2021 14:53:48 +0100 Message-Id: <20210315135513.213734968@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135507.611436477@linuxfoundation.org> References: <20210315135507.611436477@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman From: Takashi Iwai commit eea46a0879bcca23e15071f9968c0f6e6596e470 upstream. The per_pin->work might be still floating at the suspend, and this may hit the access to the hardware at an unexpected timing. Cancel the work properly at the suspend callback for avoiding the buggy access. Note that the bug doesn't trigger easily in the recent kernels since the work is queued only when the repoll count is set, and usually it's only at the resume callback, but it's still possible to hit in theory. BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1182377 Reported-and-tested-by: Abhishek Sahu Cc: Link: https://lore.kernel.org/r/20210310112809.9215-4-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/patch_hdmi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2472,6 +2472,18 @@ static void generic_hdmi_free(struct hda } #ifdef CONFIG_PM +static int generic_hdmi_suspend(struct hda_codec *codec) +{ + struct hdmi_spec *spec = codec->spec; + int pin_idx; + + for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { + struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); + cancel_delayed_work_sync(&per_pin->work); + } + return 0; +} + static int generic_hdmi_resume(struct hda_codec *codec) { struct hdmi_spec *spec = codec->spec; @@ -2495,6 +2507,7 @@ static const struct hda_codec_ops generi .build_controls = generic_hdmi_build_controls, .unsol_event = hdmi_unsol_event, #ifdef CONFIG_PM + .suspend = generic_hdmi_suspend, .resume = generic_hdmi_resume, #endif };