From patchwork Tue Jun 1 23:44:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuninori Morimoto X-Patchwork-Id: 452557 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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS 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 65A5BC4708F for ; Tue, 1 Jun 2021 23:45:51 +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 B7FFB613F2 for ; Tue, 1 Jun 2021 23:45:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B7FFB613F2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=renesas.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 44D4C16F1; Wed, 2 Jun 2021 01:44:59 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 44D4C16F1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1622591149; bh=xc09yV7rcHPOSOuKKGGKU7+L8n4PmfFuDU1p6vRSa7s=; h=Date:From:Subject:To:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=qXdwHJdLEDjNeQgw4ezitujiL8wOlSQtfUDNblDue1bFppFrkaDuNEOhSqTvgBeqI vDv4Z/f+Pr5Y19mpOCuxM+9CElesxDGHZt+mB+YDiFxLkNWLyyRACx7BnN0QK7Bo4X t194KOSz/CfVV3ZsK4KKldyJEDyUYRqi93SWGRao= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 1F0DEF804AF; Wed, 2 Jun 2021 01:44:19 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 8FF39F804CA; Wed, 2 Jun 2021 01:44:17 +0200 (CEST) Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by alsa1.perex.cz (Postfix) with ESMTP id 13E55F801DB for ; Wed, 2 Jun 2021 01:44:10 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 13E55F801DB Date: 02 Jun 2021 08:44:09 +0900 X-IronPort-AV: E=Sophos;i="5.83,241,1616425200"; d="scan'208";a="82966517" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 02 Jun 2021 08:44:09 +0900 Received: from mercury.renesas.com (unknown [10.166.252.133]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id C9D9040134FA; Wed, 2 Jun 2021 08:44:09 +0900 (JST) Message-ID: <87pmx5i20m.wl-kuninori.morimoto.gx@renesas.com> From: Kuninori Morimoto Subject: [PATCH 4/5] ASoC: rsnd: adg: check return value for rsnd_adg_get_clkin/out() User-Agent: Wanderlust/2.15.9 Emacs/26.3 Mule/6.0 To: Mark Brown In-Reply-To: <87v96xi22i.wl-kuninori.morimoto.gx@renesas.com> References: <87v96xi22i.wl-kuninori.morimoto.gx@renesas.com> MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Cc: Linux-ALSA 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: Kuninori Morimoto Current rsnd_adg_get_clkin/out() are void function, thus adg->clk/clkout[i] might be NULL. But, for_each_rsnd_clk/clkout() macros are assuming all clks are non NULL. Because of this mismatch, code can be complex and/or buggy. These functions return error by this patch, and make sure all clks are non NULL. Signed-off-by: Kuninori Morimoto --- sound/soc/sh/rcar/adg.c | 84 ++++++++++++++++++++++++++++++----------- 1 file changed, 61 insertions(+), 23 deletions(-) diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c index 3dfd07c8a7e3..0ebee1ed06a9 100644 --- a/sound/soc/sh/rcar/adg.c +++ b/sound/soc/sh/rcar/adg.c @@ -412,25 +412,53 @@ static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) return adg->null_clk; } -static void rsnd_adg_get_clkin(struct rsnd_priv *priv) +static void rsnd_adg_null_clk_clean(struct rsnd_priv *priv) +{ + struct rsnd_adg *adg = priv->adg; + + if (adg->null_clk) + clk_unregister_fixed_rate(adg->null_clk); +} + +static int rsnd_adg_get_clkin(struct rsnd_priv *priv) { struct rsnd_adg *adg = priv->adg; struct device *dev = rsnd_priv_to_dev(priv); + struct clk *clk; int i; for (i = 0; i < CLKMAX; i++) { - struct clk *clk = devm_clk_get(dev, clk_name[i]); + clk = devm_clk_get(dev, clk_name[i]); if (IS_ERR(clk)) clk = rsnd_adg_null_clk_get(priv); if (IS_ERR(clk)) - dev_err(dev, "no adg clock (%s)\n", clk_name[i]); + goto err; adg->clk[i] = clk; } + + return 0; + +err: + dev_err(dev, "adg clock IN get failed\n"); + + rsnd_adg_null_clk_clean(priv); + + return -EIO; +} + +static void rsnd_adg_unregister_clkout(struct rsnd_priv *priv) +{ + struct rsnd_adg *adg = priv->adg; + struct clk *clk; + int i; + + for_each_rsnd_clkout(clk, adg, i) + clk_unregister_fixed_rate(clk); } -static void rsnd_adg_get_clkout(struct rsnd_priv *priv) +static int rsnd_adg_get_clkout(struct rsnd_priv *priv) { struct rsnd_adg *adg = priv->adg; struct clk *clk; @@ -472,9 +500,8 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) req_size = prop->length / sizeof(u32); if (req_size > REQ_SIZE) { - dev_err(dev, - "too many clock-frequency, use top %d\n", REQ_SIZE); - req_size = REQ_SIZE; + dev_err(dev, "too many clock-frequency\n"); + return -EINVAL; } of_property_read_u32_array(np, "clock-frequency", req_rate, req_size); @@ -555,10 +582,11 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) if (!count) { clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT], parent_clk_name, 0, req_rate[0]); - if (!IS_ERR(clk)) { - adg->clkout[CLKOUT] = clk; - of_clk_add_provider(np, of_clk_src_simple_get, clk); - } + if (IS_ERR(clk)) + goto err; + + adg->clkout[CLKOUT] = clk; + of_clk_add_provider(np, of_clk_src_simple_get, clk); } /* * for clkout0/1/2/3 @@ -568,8 +596,10 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) clk = clk_register_fixed_rate(dev, clkout_name[i], parent_clk_name, 0, req_rate[0]); - if (!IS_ERR(clk)) - adg->clkout[i] = clk; + if (IS_ERR(clk)) + goto err; + + adg->clkout[i] = clk; } adg->onecell.clks = adg->clkout; adg->onecell.clk_num = CLKOUTMAX; @@ -581,6 +611,15 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) adg->ckr = ckr; adg->rbga = rbga; adg->rbgb = rbgb; + + return 0; + +err: + dev_err(dev, "adg clock OUT get failed\n"); + + rsnd_adg_unregister_clkout(priv); + + return -EIO; } #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) @@ -646,8 +685,13 @@ int rsnd_adg_probe(struct rsnd_priv *priv) priv->adg = adg; - rsnd_adg_get_clkin(priv); - rsnd_adg_get_clkout(priv); + ret = rsnd_adg_get_clkin(priv); + if (ret) + return ret; + + ret = rsnd_adg_get_clkout(priv); + if (ret) + return ret; rsnd_adg_clk_enable(priv); rsnd_adg_clk_dbg_info(priv, NULL); @@ -659,19 +703,13 @@ void rsnd_adg_remove(struct rsnd_priv *priv) { struct device *dev = rsnd_priv_to_dev(priv); struct device_node *np = dev->of_node; - struct rsnd_adg *adg = priv->adg; - struct clk *clk; - int i; - for_each_rsnd_clkout(clk, adg, i) - if (adg->clkout[i]) - clk_unregister_fixed_rate(adg->clkout[i]); + rsnd_adg_unregister_clkout(priv); of_clk_del_provider(np); rsnd_adg_clk_disable(priv); /* It should be called after rsnd_adg_clk_disable() */ - if (adg->null_clk) - clk_unregister_fixed_rate(adg->null_clk); + rsnd_adg_null_clk_clean(priv); }