From patchwork Thu Sep 3 20:46:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11756307 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E47EE13B1 for ; Fri, 4 Sep 2020 08:42:26 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7AA3220791 for ; Fri, 4 Sep 2020 08:42:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="a3lpb+R/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7AA3220791 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id D0E0E1AD4; Fri, 4 Sep 2020 10:41:40 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz D0E0E1AD4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1599208944; bh=/6ovzl882hppiTLycTx4/fkgDv74abJvRaN/tprMr0U=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=a3lpb+R/LbEVtTShrtiLXICOa+mAaLfuNk+tZY8X8+ePhH2+M2423MtSFoElQ4evd xIkKm3I3gDPuDoVjcdio9UNz8L9zG+Ye4Ognc9QJ6d8unqE61s03liuqcMerNNufSB Efs2J6f1PRxRhQX3I08fcujqqNXdDdhcvGBW/Iw4= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 9E8D7F8026F; Fri, 4 Sep 2020 10:40:51 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id C5D44F802BC; Fri, 4 Sep 2020 10:40:49 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=DATE_IN_PAST_06_12, SPF_HELO_PASS,SPF_NONE,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 62F21F801DA for ; Fri, 4 Sep 2020 10:40:43 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 62F21F801DA IronPort-SDR: wB4Uf8Zcf4ZEgDZ9Z9h2onvgvTIYDeCvr4jisNACJsRs0hYACNY5jgol0XqhVwGgKCuX9mayp7 /HvCdVIwanog== X-IronPort-AV: E=McAfee;i="6000,8403,9733"; a="137231243" X-IronPort-AV: E=Sophos;i="5.76,389,1592895600"; d="scan'208";a="137231243" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2020 01:40:39 -0700 IronPort-SDR: 50nrgL/5igyKZdf4Mkjq06CHEwygX49SYgPoXEadfUSnhVQ8//e63PjAdPFQH3xjsA6qGhXJyX SDI9X/Po3KqQ== X-IronPort-AV: E=Sophos;i="5.76,389,1592895600"; d="scan'208";a="478402092" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2020 01:40:35 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH v2 1/3] ASoC: soc-dai: clarify return value for get_sdw_stream() Date: Fri, 4 Sep 2020 04:46:48 +0800 Message-Id: <20200903204650.31098-2-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200903204650.31098-1-yung-chuan.liao@linux.intel.com> References: <20200903204650.31098-1-yung-chuan.liao@linux.intel.com> Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, mengdong.lin@intel.com, sanyog.r.kale@intel.com, rander.wang@linux.intel.com, bard.liao@intel.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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" From: Pierre-Louis Bossart Previous changes move to use ERR_PTR(-ENOTSUPP), but it's not clear what implementations can return in case of errors. Explicitly document that NULL is not a possible return value, only ERR_PTR with a negative error code is valid. Fixes: 308811a327c38 ('ASoC: soc-dai: return proper error for get_sdw_stream()') Cc: Srinivas Kandagatla Reported-by: Bard Liao Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao --- include/sound/soc-dai.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 776a60529e70..8b693dade9c6 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -471,7 +471,8 @@ static inline int snd_soc_dai_set_sdw_stream(struct snd_soc_dai *dai, * This routine only retrieves that was previously configured * with snd_soc_dai_get_sdw_stream() * - * Returns pointer to stream or -ENOTSUPP if callback is not supported; + * Returns pointer to stream or an ERR_PTR value, e.g. + * ERR_PTR(-ENOTSUPP) if callback is not supported; */ static inline void *snd_soc_dai_get_sdw_stream(struct snd_soc_dai *dai, int direction)