usb: gadget: pxa25x_udc: use devm_ functions

This patch introduces the use of devm_request_irq, devm_gpio_request,
devm_clk_get etc. instead of the corresponding unmanaged interfaces. The
calls to the functions like free_irq to free the allocated resources are
removed as they are no longer required. Some labels in the probe function
are also done away with and the name of the label err_gpio_pullup is
changed to make it less specific to the context.

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

drivers/usb/gadget/pxa25x_udc.c

@@ -2105,11 +2105,9 @@ static int pxa25x_udc_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return -ENODEV;
 
-	dev->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(dev->clk)) {
-		retval = PTR_ERR(dev->clk);
-		goto err_clk;
-	}
+	dev->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(dev->clk))
+		return PTR_ERR(dev->clk);
 
 	pr_debug("%s: IRQ %d%s%s\n", driver_name, irq,
 		dev->has_cfr ? "" : " (!cfr)",
@@ -2120,15 +2118,16 @@ static int pxa25x_udc_probe(struct platform_device *pdev)
 	dev->dev = &pdev->dev;
 	dev->mach = dev_get_platdata(&pdev->dev);
 
-	dev->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
+	dev->transceiver = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
 
 	if (gpio_is_valid(dev->mach->gpio_pullup)) {
-		if ((retval = gpio_request(dev->mach->gpio_pullup,
-				"pca25x_udc GPIO PULLUP"))) {
+		retval = devm_gpio_request(&pdev->dev, dev->mach->gpio_pullup,
+					   "pca25x_udc GPIO PULLUP");
+		if (retval) {
 			dev_dbg(&pdev->dev,
 				"can't get pullup gpio %d, err: %d\n",
 				dev->mach->gpio_pullup, retval);
-			goto err_gpio_pullup;
+			goto err;
 		}
 		gpio_direction_output(dev->mach->gpio_pullup, 0);
 	}
@@ -2146,30 +2145,32 @@ static int pxa25x_udc_probe(struct platform_device *pdev)
 	dev->vbus = 0;
 
 	/* irq setup after old hardware state is cleaned up */
-	retval = request_irq(irq, pxa25x_udc_irq,
-			0, driver_name, dev);
+	retval = devm_request_irq(&pdev->dev, irq, pxa25x_udc_irq, 0,
+				  driver_name, dev);
 	if (retval != 0) {
 		pr_err("%s: can't get irq %d, err %d\n",
 			driver_name, irq, retval);
-		goto err_irq1;
+		goto err;
 	}
 	dev->got_irq = 1;
 
 #ifdef CONFIG_ARCH_LUBBOCK
 	if (machine_is_lubbock()) {
-		retval = request_irq(LUBBOCK_USB_DISC_IRQ, lubbock_vbus_irq,
-				     0, driver_name, dev);
+		retval = devm_request_irq(&pdev->dev, LUBBOCK_USB_DISC_IRQ,
+					  lubbock_vbus_irq, 0, driver_name,
+					  dev);
 		if (retval != 0) {
 			pr_err("%s: can't get irq %i, err %d\n",
 				driver_name, LUBBOCK_USB_DISC_IRQ, retval);
-			goto err_irq_lub;
+			goto err;
 		}
-		retval = request_irq(LUBBOCK_USB_IRQ, lubbock_vbus_irq,
-				     0, driver_name, dev);
+		retval = devm_request_irq(&pdev->dev, LUBBOCK_USB_IRQ,
+					  lubbock_vbus_irq, 0, driver_name,
+					  dev);
 		if (retval != 0) {
 			pr_err("%s: can't get irq %i, err %d\n",
 				driver_name, LUBBOCK_USB_IRQ, retval);
-			goto lubbock_fail0;
+			goto err;
 		}
 	} else
 #endif
@@ -2180,22 +2181,9 @@ static int pxa25x_udc_probe(struct platform_device *pdev)
 		return retval;
 
 	remove_debug_files(dev);
-#ifdef	CONFIG_ARCH_LUBBOCK
-lubbock_fail0:
-	free_irq(LUBBOCK_USB_DISC_IRQ, dev);
- err_irq_lub:
-	free_irq(irq, dev);
-#endif
- err_irq1:
-	if (gpio_is_valid(dev->mach->gpio_pullup))
-		gpio_free(dev->mach->gpio_pullup);
- err_gpio_pullup:
-	if (!IS_ERR_OR_NULL(dev->transceiver)) {
-		usb_put_phy(dev->transceiver);
+ err:
+	if (!IS_ERR_OR_NULL(dev->transceiver))
 		dev->transceiver = NULL;
-	}
-	clk_put(dev->clk);
- err_clk:
 	return retval;
 }
 
@@ -2217,25 +2205,8 @@ static int pxa25x_udc_remove(struct platform_device *pdev)
 
 	remove_debug_files(dev);
 
-	if (dev->got_irq) {
-		free_irq(platform_get_irq(pdev, 0), dev);
-		dev->got_irq = 0;
-	}
-#ifdef CONFIG_ARCH_LUBBOCK
-	if (machine_is_lubbock()) {
-		free_irq(LUBBOCK_USB_DISC_IRQ, dev);
-		free_irq(LUBBOCK_USB_IRQ, dev);
-	}
-#endif
-	if (gpio_is_valid(dev->mach->gpio_pullup))
-		gpio_free(dev->mach->gpio_pullup);
-
-	clk_put(dev->clk);
-
-	if (!IS_ERR_OR_NULL(dev->transceiver)) {
-		usb_put_phy(dev->transceiver);
+	if (!IS_ERR_OR_NULL(dev->transceiver))
 		dev->transceiver = NULL;
-	}
 
 	the_controller = NULL;
 	return 0;