linux-kernel - [PATCH] ASoC: samsung: Fix checking return value of clk

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Date:	Tue, 13 Sep 2011 22:44:22 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Christian Pellegrin <chripell@...lware.org>,
	Ben Dooks <ben@...tec.co.uk>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Sangbeom Kim <sbkim73@...sung.com>, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	alsa-devel@...a-project.org
Subject: [PATCH] ASoC: samsung: Fix checking return value of clk_get

clk_get() returns a pointer to the struct clk or an ERR_PTR().

Signed-off-by: Axel Lin <axel.lin@...il.com>
Cc: Christian Pellegrin <chripell@...lware.org>
Cc: Ben Dooks <ben@...tec.co.uk>
Cc: Sangbeom Kim <sbkim73@...sung.com>
Cc: Jassi Brar <jassisinghbrar@...il.com>
---
 sound/soc/samsung/s3c2412-i2s.c     |    2 +-
 sound/soc/samsung/s3c24xx-i2s.c     |    2 +-
 sound/soc/samsung/s3c24xx_uda134x.c |    4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
index 841ab14..cecdbad 100644
--- a/sound/soc/samsung/s3c2412-i2s.c
+++ b/sound/soc/samsung/s3c2412-i2s.c
@@ -69,7 +69,7 @@ static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
 	s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
 
 	s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
-	if (s3c2412_i2s.iis_cclk == NULL) {
+	if (IS_ERR(s3c2412_i2s.iis_cclk)) {
 		pr_err("failed to get i2sclk clock\n");
 		iounmap(s3c2412_i2s.regs);
 		return -ENODEV;
diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index 63d8849..9f888bc 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -383,7 +383,7 @@ static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
 		return -ENXIO;
 
 	s3c24xx_i2s.iis_clk = clk_get(dai->dev, "iis");
-	if (s3c24xx_i2s.iis_clk == NULL) {
+	if (IS_ERR(s3c24xx_i2s.iis_clk)) {
 		pr_err("failed to get iis_clock\n");
 		iounmap(s3c24xx_i2s.regs);
 		return -ENODEV;
diff --git a/sound/soc/samsung/s3c24xx_uda134x.c b/sound/soc/samsung/s3c24xx_uda134x.c
index dc9d551..4da57cd 100644
--- a/sound/soc/samsung/s3c24xx_uda134x.c
+++ b/sound/soc/samsung/s3c24xx_uda134x.c
@@ -66,13 +66,13 @@ static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream)
 	pr_debug("%s %d\n", __func__, clk_users);
 	if (clk_users == 0) {
 		xtal = clk_get(&s3c24xx_uda134x_snd_device->dev, "xtal");
-		if (!xtal) {
+		if (IS_ERR(xtal)) {
 			printk(KERN_ERR "%s cannot get xtal\n", __func__);
 			ret = -EBUSY;
 		} else {
 			pclk = clk_get(&s3c24xx_uda134x_snd_device->dev,
 				       "pclk");
-			if (!pclk) {
+			if (IS_ERR(pclk)) {
 				printk(KERN_ERR "%s cannot get pclk\n",
 				       __func__);
 				clk_put(xtal);
-- 
1.7.4.1



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