ARM: OMAP3+: SmartReflex: fix error handling

Fix the code to correctly use IS_ERR and PTR_ERR on the return
values pointers

Reported-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/smartreflex.c

@@ -421,7 +421,7 @@ int sr_configure_errgen(struct voltagedomain *voltdm)
 	if (IS_ERR(sr)) {
 		pr_warning("%s: omap_sr struct for sr_%s not found\n",
 			__func__, voltdm->name);
-		return -EINVAL;
+		return PTR_ERR(sr);
 	}
 
 	if (!sr->clk_length)
@@ -489,7 +489,7 @@ int sr_disable_errgen(struct voltagedomain *voltdm)
 	if (IS_ERR(sr)) {
 		pr_warning("%s: omap_sr struct for sr_%s not found\n",
 			__func__, voltdm->name);
-		return -EINVAL;
+		return PTR_ERR(sr);
 	}
 
 	switch (sr->ip_type) {
@@ -540,7 +540,7 @@ int sr_configure_minmax(struct voltagedomain *voltdm)
 	if (IS_ERR(sr)) {
 		pr_warning("%s: omap_sr struct for sr_%s not found\n",
 			__func__, voltdm->name);
-		return -EINVAL;
+		return PTR_ERR(sr);
 	}
 
 	if (!sr->clk_length)
@@ -626,15 +626,15 @@ int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
 	if (IS_ERR(sr)) {
 		pr_warning("%s: omap_sr struct for sr_%s not found\n",
 			__func__, voltdm->name);
-		return -EINVAL;
+		return PTR_ERR(sr);
 	}
 
 	volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
 
 	if (IS_ERR(volt_data)) {
 		dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table"
 			"for nominal voltage %ld\n", __func__, volt);
-		return -ENODATA;
+		return PTR_ERR(volt_data);
 	}
 
 	nvalue_reciprocal = sr_retrieve_nvalue(sr, volt_data->sr_efuse_offs);
@@ -1079,7 +1079,7 @@ static int __devexit omap_sr_remove(struct platform_device *pdev)
 	if (IS_ERR(sr_info)) {
 		dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
 			__func__);
-		return -EINVAL;
+		return PTR_ERR(sr_info);
 	}
 
 	if (sr_info->autocomp_active)