[media] s5p-tv: Fix return value in sdo_probe() on error paths

Use proper return value test for clk_get() and devm_regulator_get()
functions and propagate any errors from the clock and the regulator
subsystem to the driver core. In two cases a proper error code is
now returned rather than 0.

Reported-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-tv/sdo_drv.c

@@ -341,47 +341,50 @@ static int __devinit sdo_probe(struct platform_device *pdev)
 
 	/* acquire clocks */
 	sdev->sclk_dac = clk_get(dev, "sclk_dac");
-	if (IS_ERR_OR_NULL(sdev->sclk_dac)) {
+	if (IS_ERR(sdev->sclk_dac)) {
 		dev_err(dev, "failed to get clock 'sclk_dac'\n");
-		ret = -ENXIO;
+		ret = PTR_ERR(sdev->sclk_dac);
 		goto fail;
 	}
 	sdev->dac = clk_get(dev, "dac");
-	if (IS_ERR_OR_NULL(sdev->dac)) {
+	if (IS_ERR(sdev->dac)) {
 		dev_err(dev, "failed to get clock 'dac'\n");
-		ret = -ENXIO;
+		ret = PTR_ERR(sdev->dac);
 		goto fail_sclk_dac;
 	}
 	sdev->dacphy = clk_get(dev, "dacphy");
-	if (IS_ERR_OR_NULL(sdev->dacphy)) {
+	if (IS_ERR(sdev->dacphy)) {
 		dev_err(dev, "failed to get clock 'dacphy'\n");
-		ret = -ENXIO;
+		ret = PTR_ERR(sdev->dacphy);
 		goto fail_dac;
 	}
 	sclk_vpll = clk_get(dev, "sclk_vpll");
-	if (IS_ERR_OR_NULL(sclk_vpll)) {
+	if (IS_ERR(sclk_vpll)) {
 		dev_err(dev, "failed to get clock 'sclk_vpll'\n");
-		ret = -ENXIO;
+		ret = PTR_ERR(sclk_vpll);
 		goto fail_dacphy;
 	}
 	clk_set_parent(sdev->sclk_dac, sclk_vpll);
 	clk_put(sclk_vpll);
 	sdev->fout_vpll = clk_get(dev, "fout_vpll");
-	if (IS_ERR_OR_NULL(sdev->fout_vpll)) {
+	if (IS_ERR(sdev->fout_vpll)) {
 		dev_err(dev, "failed to get clock 'fout_vpll'\n");
+		ret = PTR_ERR(sdev->fout_vpll);
 		goto fail_dacphy;
 	}
 	dev_info(dev, "fout_vpll.rate = %lu\n", clk_get_rate(sclk_vpll));
 
 	/* acquire regulator */
 	sdev->vdac = devm_regulator_get(dev, "vdd33a_dac");
-	if (IS_ERR_OR_NULL(sdev->vdac)) {
+	if (IS_ERR(sdev->vdac)) {
 		dev_err(dev, "failed to get regulator 'vdac'\n");
+		ret = PTR_ERR(sdev->vdac);
 		goto fail_fout_vpll;
 	}
 	sdev->vdet = devm_regulator_get(dev, "vdet");
-	if (IS_ERR_OR_NULL(sdev->vdet)) {
+	if (IS_ERR(sdev->vdet)) {
 		dev_err(dev, "failed to get regulator 'vdet'\n");
+		ret = PTR_ERR(sdev->vdet);
 		goto fail_fout_vpll;
 	}