[04/11] ASoC: samsung: i2s: Handle return value of clk_prepare_enable.

Commit Message

Arvind Yadav July 25, 2017, 10:14 a.m. UTC

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

Signed-off-by: Arvind Yadav <[e-mail]>
---
 sound/soc/samsung/i2s.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

Comments

Krzysztof Kozlowski July 25, 2017, 5:58 p.m. UTC | #1

On Tue, Jul 25, 2017 at 03:44:31PM +0530, Arvind Yadav wrote:
> clk_prepare_enable() can fail here and we must check its return value.
> 
> Signed-off-by: Arvind Yadav <[e-mail]>
> ---
>  sound/soc/samsung/i2s.c | 19 +++++++++++++++----
>  1 file changed, 15 insertions(+), 4 deletions(-)
> 

Reviewed-by: Krzysztof Kozlowski <[e-mail]>

Best regards,
Krzysztof

Patch

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index af3ba4d..b554497 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -550,7 +550,9 @@  static int i2s_set_sysclk(struct snd_soc_dai *dai,
 				goto err;
 			}
 
-			clk_prepare_enable(i2s->op_clk);
+			ret = clk_prepare_enable(i2s->op_clk);
+			if (ret)
+				goto err;
 			i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 
 			/* Over-ride the other's */
@@ -1132,10 +1134,19 @@  static int i2s_runtime_suspend(struct device *dev)
 static int i2s_runtime_resume(struct device *dev)
 {
 	struct i2s_dai *i2s = dev_get_drvdata(dev);
+	int ret;
 
-	clk_prepare_enable(i2s->clk);
-	if (i2s->op_clk)
-		clk_prepare_enable(i2s->op_clk);
+	ret = clk_prepare_enable(i2s->clk);
+	if (ret)
+		return ret;
+
+	if (i2s->op_clk) {
+		ret = clk_prepare_enable(i2s->op_clk);
+		if (ret) {
+			clk_disable_unprepare(i2s->clk);
+			return ret;
+		}
+	}
 
 	writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
 	writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);