Merge branch 'pm-devfreq'

* pm-devfreq:
PM / devfreq: create_freezable_workqueue() doesn't return an ERR_PTR
PM / devfreq: Remove duplicate header file inclusion in exynos5_bus.c
PM / devfreq: Use devm_* APIs in exynos5_bus.c
PM / devfreq: Remove redundant platform_set_drvdata() in exynos5_bus.c
PM / devfreq: Fix incorrect usage of IS_ERR_OR_NULL in exynos5_bus.c

drivers/devfreq/devfreq.c

···
 	}
 
 	devfreq_wq = create_freezable_workqueue("devfreq_wq");
-	if (IS_ERR(devfreq_wq)) {
+	if (!devfreq_wq) {
 		class_destroy(devfreq_class);
 		pr_err("%s: couldn't create workqueue\n", __FILE__);
-		return PTR_ERR(devfreq_wq);
+		return -ENOMEM;
 	}
 	devfreq_class->dev_groups = devfreq_groups;
 

drivers/devfreq/exynos/exynos5_bus.c

···
 
 	err = exynos5250_init_int_tables(data);
 	if (err)
-		goto err_regulator;
+		return err;
 
-	data->vdd_int = regulator_get(dev, "vdd_int");
+	data->vdd_int = devm_regulator_get(dev, "vdd_int");
 	if (IS_ERR(data->vdd_int)) {
 		dev_err(dev, "Cannot get the regulator \"vdd_int\"\n");
-		err = PTR_ERR(data->vdd_int);
-		goto err_regulator;
+		return PTR_ERR(data->vdd_int);
 	}
 
-	data->int_clk = clk_get(dev, "int_clk");
+	data->int_clk = devm_clk_get(dev, "int_clk");
 	if (IS_ERR(data->int_clk)) {
 		dev_err(dev, "Cannot get clock \"int_clk\"\n");
-		err = PTR_ERR(data->int_clk);
-		goto err_clock;
+		return PTR_ERR(data->int_clk);
 	}
 
 	rcu_read_lock();
···
 		rcu_read_unlock();
 		dev_err(dev, "Invalid initial frequency %lu kHz.\n",
 		       exynos5_devfreq_int_profile.initial_freq);
-		err = PTR_ERR(opp);
-		goto err_opp_add;
+		return PTR_ERR(opp);
 	}
 	initial_freq = dev_pm_opp_get_freq(opp);
 	initial_volt = dev_pm_opp_get_voltage(opp);
···
 	err = clk_set_rate(data->int_clk, initial_freq * 1000);
 	if (err) {
 		dev_err(dev, "Failed to set initial frequency\n");
-		goto err_opp_add;
+		return err;
 	}
 
 	err = exynos5_int_setvolt(data, initial_volt);
 	if (err)
-		goto err_opp_add;
+		return err;
 
 	platform_set_drvdata(pdev, data);
 
···
 
 err_devfreq_add:
 	devfreq_remove_device(data->devfreq);
-	platform_set_drvdata(pdev, NULL);
-err_opp_add:
-	clk_put(data->int_clk);
-err_clock:
-	regulator_put(data->vdd_int);
-err_regulator:
 	return err;
 }
 
···
 	pm_qos_remove_request(&data->int_req);
 	unregister_pm_notifier(&data->pm_notifier);
 	devfreq_remove_device(data->devfreq);
-	regulator_put(data->vdd_int);
-	clk_put(data->int_clk);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }
···
 
 	exynos5_devfreq_pdev =
 		platform_device_register_simple("exynos5-bus-int", -1, NULL, 0);
-	if (IS_ERR_OR_NULL(exynos5_devfreq_pdev)) {
+	if (IS_ERR(exynos5_devfreq_pdev)) {
 		ret = PTR_ERR(exynos5_devfreq_pdev);
 		goto out1;
 	}