gpio/gpio-pl061: Covert to use devm_* functions

Use the devm_* family of functions during probe to reduce the error
handling code footprint.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 22 insertions, 37 deletions

diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index b4b5da4fd2cc..31d9c9e79ea9 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -216,39 +216,34 @@ static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
                                IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
 }
 
-static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
+static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
 {
-        struct pl061_platform_data *pdata;
+        struct device *dev = &adev->dev;
+        struct pl061_platform_data *pdata = dev->platform_data;
         struct pl061_gpio *chip;
         int ret, irq, i;
 
-        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+        chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
         if (chip == NULL)
                 return -ENOMEM;
 
-        pdata = dev->dev.platform_data;
         if (pdata) {
                 chip->gc.base = pdata->gpio_base;
                 chip->irq_base = pdata->irq_base;
-        } else if (dev->dev.of_node) {
+        } else if (adev->dev.of_node) {
                 chip->gc.base = -1;
                 chip->irq_base = 0;
-        } else {
-                ret = -ENODEV;
-                goto free_mem;
-        }
+        } else
+                return -ENODEV;
 
-        if (!request_mem_region(dev->res.start,
-                                resource_size(&dev->res), "pl061")) {
-                ret = -EBUSY;
-                goto free_mem;
-        }
+        if (!devm_request_mem_region(dev, adev->res.start,
+                                resource_size(&adev->res), "pl061"))
+                return -EBUSY;
 
-        chip->base = ioremap(dev->res.start, resource_size(&dev->res));
-        if (chip->base == NULL) {
-                ret = -ENOMEM;
-                goto release_region;
-        }
+        chip->base = devm_ioremap(dev, adev->res.start,
+                                resource_size(&adev->res));
+        if (chip->base == NULL)
+                return -ENOMEM;
 
         spin_lock_init(&chip->lock);
 
@@ -258,13 +253,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
         chip->gc.set = pl061_set_value;
         chip->gc.to_irq = pl061_to_irq;
         chip->gc.ngpio = PL061_GPIO_NR;
-        chip->gc.label = dev_name(&dev->dev);
-        chip->gc.dev = &dev->dev;
+        chip->gc.label = dev_name(dev);
+        chip->gc.dev = dev;
         chip->gc.owner = THIS_MODULE;
 
         ret = gpiochip_add(&chip->gc);
         if (ret)
-                goto iounmap;
+                return ret;
 
         /*
          * irq_chip support
@@ -276,11 +271,10 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
         pl061_init_gc(chip, chip->irq_base);
 
         writeb(0, chip->base + GPIOIE); /* disable irqs */
-        irq = dev->irq[0];
-        if (irq < 0) {
-                ret = -ENODEV;
-                goto iounmap;
-        }
+        irq = adev->irq[0];
+        if (irq < 0)
+                return -ENODEV;
+
         irq_set_chained_handler(irq, pl061_irq_handler);
         irq_set_handler_data(irq, chip);
 
@@ -294,18 +288,9 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
                 }
         }
 
-        amba_set_drvdata(dev, chip);
+        amba_set_drvdata(adev, chip);
 
         return 0;
-
-iounmap:
-        iounmap(chip->base);
-release_region:
-        release_mem_region(dev->res.start, resource_size(&dev->res));
-free_mem:
-        kfree(chip);
-
-        return ret;
 }
 
 #ifdef CONFIG_PM