linux-kernel - [PATCH 06/11] ASoC: mxs-saif: Handle return value of clk_prepare_enable/clk

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Date:   Tue, 25 Jul 2017 15:44:33 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     perex@...ex.cz, tiwai@...e.com, broonie@...nel.org,
        krzk@...nel.org, sbkim73@...sung.com, lgirdwood@...il.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH 06/11] ASoC: mxs-saif: Handle return value of clk_prepare_enable/clk_prepare.

clk_prepare_enable() and clk_prepare() can fail here and
we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 sound/soc/mxs/mxs-saif.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c
index b42f301..156aa7c 100644
--- a/sound/soc/mxs/mxs-saif.c
+++ b/sound/soc/mxs/mxs-saif.c
@@ -125,7 +125,9 @@ static int mxs_saif_set_clk(struct mxs_saif *saif,
 	 *
 	 * If MCLK is not used, we just set saif clk to 512*fs.
 	 */
-	clk_prepare_enable(master_saif->clk);
+	ret = clk_prepare_enable(master_saif->clk);
+	if (ret)
+		return ret;
 
 	if (master_saif->mclk_in_use) {
 		switch (mclk / rate) {
@@ -388,6 +390,7 @@ static int mxs_saif_startup(struct snd_pcm_substream *substream,
 			   struct snd_soc_dai *cpu_dai)
 {
 	struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+	int ret;
 
 	/* clear error status to 0 for each re-open */
 	saif->fifo_underrun = 0;
@@ -401,7 +404,9 @@ static int mxs_saif_startup(struct snd_pcm_substream *substream,
 	__raw_writel(BM_SAIF_CTRL_CLKGATE,
 		saif->base + SAIF_CTRL + MXS_CLR_ADDR);
 
-	clk_prepare(saif->clk);
+	ret = clk_prepare(saif->clk);
+	if (ret)
+		return ret;
 
 	return 0;
 }
@@ -468,7 +473,9 @@ static int mxs_saif_hw_params(struct snd_pcm_substream *substream,
 		if (ret)
 			return ret;
 
-		clk_prepare(master_saif->clk);
+		ret = clk_prepare(master_saif->clk);
+		if (ret)
+			return ret;
 	}
 
 	scr = __raw_readl(saif->base + SAIF_CTRL);
-- 
1.9.1