From patchwork Sun Apr 30 13:15:28 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 104381 Delivered-To: patch@linaro.org Received: by 10.140.109.52 with SMTP id k49csp1042075qgf; Sun, 30 Apr 2017 06:16:01 -0700 (PDT) X-Received: by 10.223.165.5 with SMTP id i5mr6345108wrb.197.1493558161576; Sun, 30 Apr 2017 06:16:01 -0700 (PDT) Return-Path: Received: from alsa0.perex.cz (alsa0.perex.cz. [77.48.224.243]) by mx.google.com with ESMTP id v105si12009560wrb.306.2017.04.30.06.16.01; Sun, 30 Apr 2017 06:16:01 -0700 (PDT) Received-SPF: pass (google.com: domain of alsa-devel-bounces@alsa-project.org designates 77.48.224.243 as permitted sender) client-ip=77.48.224.243; Authentication-Results: mx.google.com; spf=pass (google.com: domain of alsa-devel-bounces@alsa-project.org designates 77.48.224.243 as permitted sender) smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id E31E9266BF2; Sun, 30 Apr 2017 15:15:45 +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 A242A266BE6; Sun, 30 Apr 2017 15:15:43 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RP_MATCHES_RCVD, SPF_PASS, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mezzanine.sirena.org.uk (mezzanine.sirena.org.uk [106.187.55.193]) by alsa0.perex.cz (Postfix) with ESMTP id 74A83266BC1 for ; Sun, 30 Apr 2017 15:15:41 +0200 (CEST) Received: from [211.55.52.2] (helo=finisterre) by mezzanine.sirena.org.uk with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1d4ohF-0005y0-CH; Sun, 30 Apr 2017 13:15:31 +0000 Received: from broonie by finisterre with local (Exim 4.89) (envelope-from ) id 1d4ohE-00055i-Cr; Sun, 30 Apr 2017 22:15:28 +0900 From: Mark Brown To: Daniel Baluta In-Reply-To: <1493212192-7930-2-git-send-email-daniel.baluta@nxp.com> Message-Id: Date: Sun, 30 Apr 2017 22:15:28 +0900 X-SA-Exim-Connect-IP: 211.55.52.2 X-SA-Exim-Mail-From: broonie@sirena.org.uk X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Cc: alsa-devel@alsa-project.org, arnd@arndb.de, linux-kernel@vger.kernel.org, patches@opensource.wolfsonmicro.com, tiwai@suse.com, lgirdwood@gmail.com, broonie@kernel.org, ckeepax@opensource.wolfsonmicro.com Subject: [alsa-devel] Applied "ASoC: codec: wm9860: avoid maybe-uninitialized warning" to the asoc tree 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 The patch ASoC: codec: wm9860: avoid maybe-uninitialized warning has been applied to the asoc tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 66772eda0edbfbbbe7767a6b5d07e09dae84403d Mon Sep 17 00:00:00 2001 From: Daniel Baluta Date: Wed, 26 Apr 2017 16:09:51 +0300 Subject: [PATCH] ASoC: codec: wm9860: avoid maybe-uninitialized warning The new PLL configuration code triggers a harmless warning: sound/soc/codecs/wm8960.c: In function 'wm8960_configure_clocking': sound/soc/codecs/wm8960.c:735:3: error: 'best_freq_out' may be used uninitialized in this function [-Werror=maybe-uninitialized] wm8960_set_pll(codec, freq_in, best_freq_out); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:699:12: note: 'best_freq_out' was declared here Fix this by reworking the code such that: 1) When there is no PLL freq available return -EINVAL and make sure *bclk_idx, *dac_idx, *sysclk_idx are initialized with invalid values. 2) When there is a PLL freq available initialize *bclk_idx, *dac_idx and *sysclk_idx with correct values and immediately return the freq available. Fixes: 84fdc00d519f ("ASoC: codec: wm9860: Refactor PLL out freq search") Fixes: 303e8954af8d ("ASoC: codec: wm8960: Stop when a matching PLL freq is found") Suggested-by: Arnd Bergmann Signed-off-by: Daniel Baluta Acked-by: Arnd Bergmann Signed-off-by: Mark Brown --- sound/soc/codecs/wm8960.c | 26 +++++++++----------------- 1 file changed, 9 insertions(+), 17 deletions(-) -- 2.11.0 _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index ace69da97cb8..d899623fb101 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -686,7 +686,7 @@ int wm8960_configure_sysclk(struct wm8960_priv *wm8960, int mclk, * @bclk_idx: bclk_divs index for found bclk * * Returns: - * -1, in case no PLL frequency out available was found + * < 0, in case no PLL frequency out available was found * >=0, in case we could derive bclk, lrclk, sysclk from PLL out using * (@sysclk_idx, @dac_idx, @bclk_idx) dividers */ @@ -696,13 +696,13 @@ int wm8960_configure_pll(struct snd_soc_codec *codec, int freq_in, { struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); int sysclk, bclk, lrclk, freq_out; - int diff, best_freq_out; + int diff; int i, j, k; bclk = wm8960->bclk; lrclk = wm8960->lrclk; - *bclk_idx = -1; + *sysclk_idx = *dac_idx = *bclk_idx = -1; for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) { if (sysclk_divs[i] == -1) @@ -720,21 +720,12 @@ int wm8960_configure_pll(struct snd_soc_codec *codec, int freq_in, *sysclk_idx = i; *dac_idx = j; *bclk_idx = k; - best_freq_out = freq_out; - break; + return freq_out; } } - if (k != ARRAY_SIZE(bclk_divs)) - break; } - if (j != ARRAY_SIZE(dac_divs)) - break; } - - if (*bclk_idx != -1) - wm8960_set_pll(codec, freq_in, best_freq_out); - - return *bclk_idx; + return -EINVAL; } static int wm8960_configure_clocking(struct snd_soc_codec *codec) { @@ -783,11 +774,12 @@ static int wm8960_configure_clocking(struct snd_soc_codec *codec) } } - ret = wm8960_configure_pll(codec, freq_in, &i, &j, &k); - if (ret < 0) { + freq_out = wm8960_configure_pll(codec, freq_in, &i, &j, &k); + if (freq_out < 0) { dev_err(codec->dev, "failed to configure clock via PLL\n"); - return -EINVAL; + return freq_out; } + wm8960_set_pll(codec, freq_in, freq_out); configure_clock: /* configure sysclk clock */