From patchwork Tue Jul 22 14:13:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Sakamoto X-Patchwork-Id: 4603131 X-Patchwork-Delegate: tiwai@suse.de 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 [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8DACAC0514 for ; Tue, 22 Jul 2014 14:14:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id ACB1720148 for ; Tue, 22 Jul 2014 14:14:48 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 29E3E200FE for ; Tue, 22 Jul 2014 14:14:47 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 354DF2656D9; Tue, 22 Jul 2014 16:14:46 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 96B41265538; Tue, 22 Jul 2014 16:14:21 +0200 (CEST) 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 1DD8626557B; Tue, 22 Jul 2014 16:14:20 +0200 (CEST) Received: from smtp302.phy.lolipop.jp (smtp302.phy.lolipop.jp [210.157.22.85]) by alsa0.perex.cz (Postfix) with ESMTP id 1B13A265528 for ; Tue, 22 Jul 2014 16:14:04 +0200 (CEST) Received: from smtp302.phy.lolipop.lan (HELO smtp302.phy.lolipop.jp) (172.17.1.85) (smtp-auth username m12129643-o-takashi, mechanism plain) by smtp302.phy.lolipop.jp (qpsmtpd/0.82) with ESMTPA; Tue, 22 Jul 2014 23:14:03 +0900 Received: from 127.0.0.1 (127.0.0.1) by smtp302.phy.lolipop.jp (LOLIPOP-Fsecure); Tue, 22 Jul 2014 23:13:57 +0900 (JST) X-Virus-Status: clean(LOLIPOP-Fsecure) From: Takashi Sakamoto To: clemens@ladisch.de, tiwai@suse.de, perex@perex.cz Date: Tue, 22 Jul 2014 23:13:56 +0900 Message-Id: <1406038436-18701-1-git-send-email-o-takashi@sakamocchi.jp> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1406038263-18558-1-git-send-email-o-takashi@sakamocchi.jp> References: <1406038263-18558-1-git-send-email-o-takashi@sakamocchi.jp> Cc: alsa-devel@alsa-project.org, darrena092@gmail.com Subject: [alsa-devel] [PATCH 3/3] bebob: Correction for return value of .put callback 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP This commit is for correction of my misunderstanding about return value of .put callback in ALSA Control interface. According to 'Writing ALSA Driver' (*1), return value of the callback has three patterns; 1: changed, 0: not changed, an negative value: fatal error. But I misunderstood that it's boolean; zero or nonzero. *1: Writing an ALSA Driver (2005, Takashi Iwai) http://www.alsa-project.org/main/index.php/ALSA_Driver_Documentation Signed-off-by: Takashi Sakamoto --- sound/firewire/bebob/bebob_maudio.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index 42e6f22..d6d6ff8 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -391,7 +391,10 @@ static int special_clk_ctl_put(struct snd_kcontrol *kctl, params->clk_lock); mutex_unlock(&bebob->mutex); - return err >= 0; + if (err >= 0) + err = 1; + + return err; } static struct snd_kcontrol_new special_clk_ctl = { .name = "Clock Source", @@ -491,14 +494,16 @@ static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, unsigned int id, dig_in_fmt, dig_in_iface; int err; - mutex_lock(&bebob->mutex); - id = uval->value.enumerated.item[0]; + if (id >= ARRAY_SIZE(special_dig_in_iface_labels)) + return -EINVAL; /* decode user value */ dig_in_fmt = (id >> 1) & 0x01; dig_in_iface = id & 0x01; + mutex_lock(&bebob->mutex); + err = avc_maudio_set_special_clk(bebob, params->clk_src, dig_in_fmt, @@ -508,14 +513,17 @@ static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, goto end; /* For ADAT, optical interface is only available. */ - if (params->dig_in_fmt > 0) + if (params->dig_in_fmt > 0) { + err = 1; goto end; + } /* For S/PDIF, optical/coaxial interfaces are selectable. */ err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface); if (err < 0) dev_err(&bebob->unit->device, "fail to set digital input interface: %d\n", err); + err = 1; end: special_stream_formation_set(bebob); mutex_unlock(&bebob->mutex); @@ -567,16 +575,20 @@ static int special_dig_out_iface_ctl_set(struct snd_kcontrol *kctl, unsigned int id; int err; - mutex_lock(&bebob->mutex); - id = uval->value.enumerated.item[0]; + if (id >= ARRAY_SIZE(special_dig_out_iface_labels)) + return -EINVAL; + + mutex_lock(&bebob->mutex); err = avc_maudio_set_special_clk(bebob, params->clk_src, params->dig_in_fmt, id, params->clk_lock); - if (err >= 0) + if (err >= 0) { special_stream_formation_set(bebob); + err = 1; + } mutex_unlock(&bebob->mutex); return err;