i2c: s3c2410: Check clk_prepare_enable() return value

The clk_prepare_enable() function can fail so check the return
value and propagate the error in case of a failure.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-s3c2410.c

@@ -1158,7 +1158,12 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	/* initialise the i2c controller */
-	clk_prepare_enable(i2c->clk);
+	ret = clk_prepare_enable(i2c->clk);
+	if (ret) {
+		dev_err(&pdev->dev, "I2C clock enable failed\n");
+		return ret;
+	}
+
 	ret = s3c24xx_i2c_init(i2c);
 	clk_disable(i2c->clk);
 	if (ret != 0) {