usb: phy: phy-gpio-vbus-usb: use devm_ functions

The various devm_ functions allocate memory that is released when a
driver detaches.  This patch uses devm_kzalloc, devm_request_irq,
devm_gpio_request, devm_regulator_get etc. for data that is
allocated in the probe function of a platform device and is only
freed in the remove function. The corresponding free functions are
removed and the labels are done away with.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/phy/phy-gpio-vbus-usb.c b/drivers/usb/phy/phy-gpio-vbus-usb.c
index 69462e0..ea9e705 100644 (file)
--- a/drivers/usb/phy/phy-gpio-vbus-usb.c
+++ b/drivers/usb/phy/phy-gpio-vbus-usb.c
@@ -253,11 +253,13 @@ static int gpio_vbus_probe(struct platform_device *pdev)
                return -EINVAL;
        gpio = pdata->gpio_vbus;
 
-       gpio_vbus = kzalloc(sizeof(struct gpio_vbus_data), GFP_KERNEL);
+       gpio_vbus = devm_kzalloc(&pdev->dev, sizeof(struct gpio_vbus_data),
+                                GFP_KERNEL);
        if (!gpio_vbus)
                return -ENOMEM;
 
-       gpio_vbus->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+       gpio_vbus->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
+                                         GFP_KERNEL);
        if (!gpio_vbus->phy.otg) {
                kfree(gpio_vbus);
                return -ENOMEM;
@@ -274,11 +276,11 @@ static int gpio_vbus_probe(struct platform_device *pdev)
        gpio_vbus->phy.otg->phy = &gpio_vbus->phy;
        gpio_vbus->phy.otg->set_peripheral = gpio_vbus_set_peripheral;
 
-       err = gpio_request(gpio, "vbus_detect");
+       err = devm_gpio_request(&pdev->dev, gpio, "vbus_detect");
        if (err) {
                dev_err(&pdev->dev, "can't request vbus gpio %d, err: %d\n",
                        gpio, err);
-               goto err_gpio;
+               return err;
        }
        gpio_direction_input(gpio);
 
@@ -296,27 +298,27 @@ static int gpio_vbus_probe(struct platform_device *pdev)
        /* if data line pullup is in use, initialize it to "not pulling up" */
        gpio = pdata->gpio_pullup;
        if (gpio_is_valid(gpio)) {
-               err = gpio_request(gpio, "udc_pullup");
+               err = devm_gpio_request(&pdev->dev, gpio, "udc_pullup");
                if (err) {
                        dev_err(&pdev->dev,
                                "can't request pullup gpio %d, err: %d\n",
                                gpio, err);
-                       gpio_free(pdata->gpio_vbus);
-                       goto err_gpio;
+                       return err;
                }
                gpio_direction_output(gpio, pdata->gpio_pullup_inverted);
        }
 
-       err = request_irq(irq, gpio_vbus_irq, irqflags, "vbus_detect", pdev);
+       err = devm_request_irq(&pdev->dev, irq, gpio_vbus_irq, irqflags,
+                              "vbus_detect", pdev);
        if (err) {
                dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
                        irq, err);
-               goto err_irq;
+               return err;
        }
 
        INIT_DELAYED_WORK(&gpio_vbus->work, gpio_vbus_work);
 
-       gpio_vbus->vbus_draw = regulator_get(&pdev->dev, "vbus_draw");
+       gpio_vbus->vbus_draw = devm_regulator_get(&pdev->dev, "vbus_draw");
        if (IS_ERR(gpio_vbus->vbus_draw)) {
                dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n",
                        PTR_ERR(gpio_vbus->vbus_draw));
@@ -328,44 +330,23 @@ static int gpio_vbus_probe(struct platform_device *pdev)
        if (err) {
                dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
                        err);
-               goto err_otg;
+               return err;
        }
 
        device_init_wakeup(&pdev->dev, pdata->wakeup);
 
        return 0;
-err_otg:
-       regulator_put(gpio_vbus->vbus_draw);
-       free_irq(irq, pdev);
-err_irq:
-       if (gpio_is_valid(pdata->gpio_pullup))
-               gpio_free(pdata->gpio_pullup);
-       gpio_free(pdata->gpio_vbus);
-err_gpio:
-       kfree(gpio_vbus->phy.otg);
-       kfree(gpio_vbus);
-       return err;
 }
 
 static int gpio_vbus_remove(struct platform_device *pdev)
 {
        struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev);
-       struct gpio_vbus_mach_info *pdata = dev_get_platdata(&pdev->dev);
-       int gpio = pdata->gpio_vbus;
 
        device_init_wakeup(&pdev->dev, 0);
        cancel_delayed_work_sync(&gpio_vbus->work);
-       regulator_put(gpio_vbus->vbus_draw);
 
        usb_remove_phy(&gpio_vbus->phy);
 
-       free_irq(gpio_vbus->irq, pdev);
-       if (gpio_is_valid(pdata->gpio_pullup))
-               gpio_free(pdata->gpio_pullup);
-       gpio_free(gpio);
-       kfree(gpio_vbus->phy.otg);
-       kfree(gpio_vbus);
-
        return 0;
 }