PM / devfreq: rk3399_dmc: Disable devfreq-event device when fails

The probe process may fail, but the devfreq event device remains
enabled. Call devfreq_event_disable_edev on the error return path.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/devfreq/rk3399_dmc.c

@@ -364,7 +364,8 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 			if (res.a0) {
 				dev_err(dev, "Failed to set dram param: %ld\n",
 					res.a0);
-				return -EINVAL;
+				ret = -EINVAL;
+				goto err_edev;
 			}
 		}
 	}
@@ -373,8 +374,10 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	if (node) {
 		data->regmap_pmu = syscon_node_to_regmap(node);
 		of_node_put(node);
-		if (IS_ERR(data->regmap_pmu))
-			return PTR_ERR(data->regmap_pmu);
+		if (IS_ERR(data->regmap_pmu)) {
+			ret = PTR_ERR(data->regmap_pmu);
+			goto err_edev;
+		}
 	}
 
 	regmap_read(data->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
@@ -392,7 +395,8 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 		data->odt_dis_freq = data->timing.lpddr4_odt_dis_freq;
 		break;
 	default:
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_edev;
 	};
 
 	arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,
@@ -426,7 +430,8 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	 */
 	if (dev_pm_opp_of_add_table(dev)) {
 		dev_err(dev, "Invalid operating-points in device tree.\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_edev;
 	}
 
 	of_property_read_u32(np, "upthreshold",
@@ -466,6 +471,9 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 
 err_free_opp:
 	dev_pm_opp_of_remove_table(&pdev->dev);
+err_edev:
+	devfreq_event_disable_edev(data->edev);
+
 	return ret;
 }