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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,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 D98F1C65BA7 for ; Fri, 5 Oct 2018 16:14:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A162C2148C for ; Fri, 5 Oct 2018 16:14:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="k5r4NrMK" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A162C2148C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729471AbeJEXOP (ORCPT ); Fri, 5 Oct 2018 19:14:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:51590 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729411AbeJEXOO (ORCPT ); Fri, 5 Oct 2018 19:14:14 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4C0832148D; Fri, 5 Oct 2018 16:14:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1538756090; bh=ef98Qogx2VjJqCBudaM/t/Q1kb0oTfnCtpjHrhh8pDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k5r4NrMKjmPFGpm4aa0aevAiuEXWQLtqzsV82uM/gb5IiVZgpggD+w3qMEqIHYwh6 jfeeB3ApIBnIBot+M48vc/nIh+BUQp4oSpOHQ+jd7N1vaCX2OA5ac+vJ9Pa9ftmjkN 4+iCavCr9UUM8n9SQ9V79XUo/KQ86CMzX6ANMNGQ= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yu Zhao , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 4.18 28/48] sound: don't call skl_init_chip() to reset intel skl soc Date: Fri, 5 Oct 2018 12:14:04 -0400 Message-Id: <20181005161424.20521-28-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181005161424.20521-1-sashal@kernel.org> References: <20181005161424.20521-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yu Zhao [ Upstream commit 75383f8d39d4c0fb96083dd460b7b139fbdac492 ] Internally, skl_init_chip() calls snd_hdac_bus_init_chip() which 1) sets bus->chip_init to prevent multiple entrances before device is stopped; 2) enables interrupt. We shouldn't use it for the purpose of resetting device only because 1) when we really want to initialize device, we won't be able to do so; 2) we are ready to handle interrupt yet, and kernel crashes when interrupt comes in. Rename azx_reset() to snd_hdac_bus_reset_link(), and use it to reset device properly. Fixes: 60767abcea3d ("ASoC: Intel: Skylake: Reset the controller in probe") Reviewed-by: Takashi Iwai Signed-off-by: Yu Zhao Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- include/sound/hdaudio.h | 1 + sound/hda/hdac_controller.c | 7 ++++--- sound/soc/intel/skylake/skl.c | 2 +- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index c052afc27547..138e976a2ba2 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -355,6 +355,7 @@ void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus); void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus); void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus); void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus); +int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset); void snd_hdac_bus_update_rirb(struct hdac_bus *bus); int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status, diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c index 11057d9f84ec..74244d8e2909 100644 --- a/sound/hda/hdac_controller.c +++ b/sound/hda/hdac_controller.c @@ -385,7 +385,7 @@ void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus) EXPORT_SYMBOL_GPL(snd_hdac_bus_exit_link_reset); /* reset codec link */ -static int azx_reset(struct hdac_bus *bus, bool full_reset) +int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset) { if (!full_reset) goto skip_reset; @@ -410,7 +410,7 @@ static int azx_reset(struct hdac_bus *bus, bool full_reset) skip_reset: /* check to see if controller is ready */ if (!snd_hdac_chip_readb(bus, GCTL)) { - dev_dbg(bus->dev, "azx_reset: controller not ready!\n"); + dev_dbg(bus->dev, "controller not ready!\n"); return -EBUSY; } @@ -425,6 +425,7 @@ static int azx_reset(struct hdac_bus *bus, bool full_reset) return 0; } +EXPORT_SYMBOL_GPL(snd_hdac_bus_reset_link); /* enable interrupts */ static void azx_int_enable(struct hdac_bus *bus) @@ -479,7 +480,7 @@ bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset) return false; /* reset controller */ - azx_reset(bus, full_reset); + snd_hdac_bus_reset_link(bus, full_reset); /* clear interrupts */ azx_int_clear(bus); diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index f0d9793f872a..c7cdfa4a7076 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -844,7 +844,7 @@ static int skl_first_init(struct hdac_ext_bus *ebus) return -ENXIO; } - skl_init_chip(bus, true); + snd_hdac_bus_reset_link(bus, true); snd_hdac_bus_parse_capabilities(bus); -- 2.17.1