From patchwork Tue Dec 8 16:08:28 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Keepax X-Patchwork-Id: 7799511 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0340DBEEE1 for ; Tue, 8 Dec 2015 16:13:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 37127204FB for ; Tue, 8 Dec 2015 16:13:29 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id F01C9203AE for ; Tue, 8 Dec 2015 16:13:27 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 36C6B266629; Tue, 8 Dec 2015 17:13:27 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 23B1C2604FA; Tue, 8 Dec 2015 17:10:12 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 35661261294; Tue, 8 Dec 2015 17:10:11 +0100 (CET) Received: from mx0a-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) by alsa0.perex.cz (Postfix) with ESMTP id 3D8562604D1 for ; Tue, 8 Dec 2015 17:09:08 +0100 (CET) Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.15.0.59/8.15.0.59) with SMTP id tB8G4jUi006740; Tue, 8 Dec 2015 10:09:07 -0600 Received: from mail1.cirrus.com (mail1.cirrus.com [141.131.3.20]) by mx0a-001ae601.pphosted.com with ESMTP id 1yn7tat4gs-1; Tue, 08 Dec 2015 10:09:07 -0600 Received: from EX12.ad.cirrus.com (unknown [172.19.9.182]) by mail1.cirrus.com (Postfix) with ESMTP id 874C33403A; Tue, 8 Dec 2015 10:09:26 -0600 (CST) Received: from imbe.wolfsonmicro.main (172.20.9.178) by EX12.ad.cirrus.com (172.19.9.182) with Microsoft SMTP Server id 14.3.248.2; Tue, 8 Dec 2015 16:08:43 +0000 Received: from algalon.wolfsonmicro.main ([172.22.20.24]) by imbe.wolfsonmicro.main (8.14.4/8.14.4) with ESMTP id tB8G8c0M003920; Tue, 8 Dec 2015 16:08:43 GMT From: Charles Keepax To: Date: Tue, 8 Dec 2015 16:08:28 +0000 Message-ID: <1449590917-21170-4-git-send-email-ckeepax@opensource.wolfsonmicro.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1449590917-21170-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> References: <1449590917-21170-1-git-send-email-ckeepax@opensource.wolfsonmicro.com> MIME-Version: 1.0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1507310000 definitions=main-1512080278 Cc: alsa-devel@alsa-project.org, vinod.koul@intel.com, patches@opensource.wolfsonmicro.com, lgirdwood@gmail.com, tiwai@suse.com Subject: [alsa-devel] [PATCH 04/13] ASoC: wm_adsp: Add power lock for firmware change control X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP We should hold the DSP power lock whilst changing the firmware since we need to check if it is running first. Signed-off-by: Charles Keepax --- sound/soc/codecs/wm_adsp.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 2ab9de8..b083642 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -451,6 +451,7 @@ static int wm_adsp_fw_put(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; struct wm_adsp *dsp = snd_soc_codec_get_drvdata(codec); + int ret = 0; if (ucontrol->value.integer.value[0] == dsp[e->shift_l].fw) return 0; @@ -458,12 +459,16 @@ static int wm_adsp_fw_put(struct snd_kcontrol *kcontrol, if (ucontrol->value.integer.value[0] >= WM_ADSP_NUM_FW) return -EINVAL; + mutex_lock(&dsp[e->shift_l].pwr_lock); + if (dsp[e->shift_l].running) - return -EBUSY; + ret = -EBUSY; + else + dsp[e->shift_l].fw = ucontrol->value.integer.value[0]; - dsp[e->shift_l].fw = ucontrol->value.integer.value[0]; + mutex_unlock(&dsp[e->shift_l].pwr_lock); - return 0; + return ret; } static const struct soc_enum wm_adsp_fw_enum[] = {