[PATCH v3 2/3] i2c: pxa: Add check for clk_enable() and clk_prepare_enable()

[Jiasheng Jiang]

Add check for the return values of clk_enable() and clk_prepare_enable()
in order to catch the potential exceptions.

Signed-off-by: Jiasheng Jiang <jiashengjiangcool at gmail.com>
---
Changelog:

v2 -> v3:

1. Roll back unsuitable dev_err_probe() to dev_err()
2. Correct the usage of dev_err_probe()

v1 -> v2:

1. Remove the Fixes tag.
2. Use dev_err_probe to simplify error handling.
---
 drivers/i2c/busses/i2c-pxa.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 4d76e71cdd4b..4a92c5386df6 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1503,7 +1503,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
 				i2c->adap.name);
 	}
 
-	clk_prepare_enable(i2c->clk);
+	ret = clk_prepare_enable(i2c->clk);
+	if (ret)
+		return dev_err_probe(&dev->dev, ret, "failed to enable clock\n");
 
 	if (i2c->use_pio) {
 		i2c->adap.algo = &i2c_pxa_pio_algorithm;
@@ -1560,8 +1562,14 @@ static int i2c_pxa_suspend_noirq(struct device *dev)
 static int i2c_pxa_resume_noirq(struct device *dev)
 {
 	struct pxa_i2c *i2c = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_enable(i2c->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable clock: %d\n", ret);
+		return ret;
+	}
 
-	clk_enable(i2c->clk);
 	i2c_pxa_reset(i2c);
 
 	return 0;
-- 
2.25.1