From patchwork Mon Apr 28 10:54:54 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 4076541 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 040049F485 for ; Mon, 28 Apr 2014 10:58:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1AC04202D1 for ; Mon, 28 Apr 2014 10:58:24 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 57C2320251 for ; Mon, 28 Apr 2014 10:58:19 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 50E99264EF3; Mon, 28 Apr 2014 12:58:18 +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 88886261A49; Mon, 28 Apr 2014 12:55:42 +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 05CAD2610D4; Mon, 28 Apr 2014 12:55:37 +0200 (CEST) Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [92.198.50.35]) by alsa0.perex.cz (Postfix) with ESMTP id EE2772610C1 for ; Mon, 28 Apr 2014 12:55:32 +0200 (CEST) Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:a236:9fff:fe00:814]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1WejDV-0008Qs-Np; Mon, 28 Apr 2014 12:55:21 +0200 Received: from mpa by dude.hi.pengutronix.de with local (Exim 4.82) (envelope-from ) id 1WejDJ-0001J3-Um; Mon, 28 Apr 2014 12:55:09 +0200 From: Markus Pargmann To: Mark Brown Date: Mon, 28 Apr 2014 12:54:54 +0200 Message-Id: <1398682498-24357-14-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1398682498-24357-1-git-send-email-mpa@pengutronix.de> References: <1398682498-24357-1-git-send-email-mpa@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:a236:9fff:fe00:814 X-SA-Exim-Mail-From: mpa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: alsa-devel@alsa-project.org Cc: Fabio Estevam , alsa-devel@alsa-project.org, Alexander Shiyan , Sascha Hauer , Timur Tabi , "Li.Xiubo@freescale.com" , kernel@pengutronix.de, Nicolin Chen , linux-arm-kernel@lists.infradead.org Subject: [alsa-devel] [PATCH v4 13/17] ASoC: fsl-ssi: remove unnecessary spinlock 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 From: Sascha Hauer The baudclock_locked variable is only used in functions which are serialized anyway from the core. No need to have a lock around the variable, so remove it. Signed-off-by: Sascha Hauer --- sound/soc/fsl/fsl_ssi.c | 21 ++++----------------- 1 file changed, 4 insertions(+), 17 deletions(-) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 8ed724c..5c6dc0a 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -163,7 +163,6 @@ struct fsl_ssi_private { bool baudclk_locked; bool use_dual_fifo; u8 i2s_mode; - spinlock_t baudclk_lock; struct clk *baudclk; struct clk *clk; struct snd_dmaengine_dai_dma_data dma_params_tx; @@ -488,13 +487,9 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai); - unsigned long flags; - if (!dai->active && !fsl_ssi_is_ac97(ssi_private)) { - spin_lock_irqsave(&ssi_private->baudclk_lock, flags); + if (!dai->active && !fsl_ssi_is_ac97(ssi_private)) ssi_private->baudclk_locked = false; - spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags); - } /* When using dual fifo mode, it is safer to ensure an even period * size. If appearing to an odd number while DMA always starts its @@ -524,7 +519,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, struct ccsr_ssi __iomem *ssi = ssi_private->ssi; int synchronous = ssi_private->cpu_dai_drv.symmetric_rates, ret; u32 pm = 999, div2, psr, stccr, mask, afreq, factor, i; - unsigned long flags, clkrate, baudrate, tmprate; + unsigned long clkrate, baudrate, tmprate; u64 sub, savesub = 100000; /* Don't apply it to any non-baudclk circumstance */ @@ -588,18 +583,14 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, else write_ssi_mask(&ssi->srccr, mask, stccr); - spin_lock_irqsave(&ssi_private->baudclk_lock, flags); if (!ssi_private->baudclk_locked) { ret = clk_set_rate(ssi_private->baudclk, baudrate); if (ret) { - spin_unlock_irqrestore(&ssi_private->baudclk_lock, - flags); dev_err(cpu_dai->dev, "failed to set baudclk rate\n"); return -EINVAL; } ssi_private->baudclk_locked = true; } - spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags); return 0; } @@ -876,7 +867,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_pcm_runtime *rtd = substream->private_data; struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai); struct ccsr_ssi __iomem *ssi = ssi_private->ssi; - unsigned long flags; switch (cmd) { case SNDRV_PCM_TRIGGER_START: @@ -895,11 +885,9 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, fsl_ssi_rx_config(ssi_private, false); if (!fsl_ssi_is_ac97(ssi_private) && (read_ssi(&ssi->scr) & - (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0) { - spin_lock_irqsave(&ssi_private->baudclk_lock, flags); + (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0) ssi_private->baudclk_locked = false; - spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags); - } + break; default: @@ -1231,7 +1219,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) ssi_private->fifo_depth = 8; ssi_private->baudclk_locked = false; - spin_lock_init(&ssi_private->baudclk_lock); dev_set_drvdata(&pdev->dev, ssi_private);