gpio: generic: use error pointers

Use the ERRPTR standard way to return an error code in a pointer
thus simplifiying the code.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index 0cdbe10..d8b1700 100644 (file)
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -579,34 +579,20 @@ EXPORT_SYMBOL_GPL(bgpio_init);
 
 static void __iomem *bgpio_map(struct platform_device *pdev,
                               const char *name,
-                              resource_size_t sane_sz,
-                              int *err)
+                              resource_size_t sane_sz)
 {
        struct resource *r;
        resource_size_t sz;
-       void __iomem *ret;
-
-       *err = 0;
 
        r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
-       if (!r) {
-               *err = -EINVAL;
-               return NULL;
-       }
+       if (!r)
+               return IOMEM_ERR_PTR(-EINVAL);
 
        sz = resource_size(r);
-       if (sz != sane_sz) {
-               *err = -EINVAL;
-               return NULL;
-       }
+       if (sz != sane_sz)
+               return IOMEM_ERR_PTR(-EINVAL);
 
-       ret = devm_ioremap_resource(&pdev->dev, r);
-       if (IS_ERR(ret)) {
-               *err = PTR_ERR(ret);
-               return NULL;
-       }
-
-       return ret;
+       return devm_ioremap_resource(&pdev->dev, r);
 }
 
 static int bgpio_pdev_probe(struct platform_device *pdev)
@@ -630,25 +616,25 @@ static int bgpio_pdev_probe(struct platform_device *pdev)
 
        sz = resource_size(r);
 
-       dat = bgpio_map(pdev, "dat", sz, &err);
-       if (err)
-               return err;
+       dat = bgpio_map(pdev, "dat", sz);
+       if (IS_ERR(dat))
+               return PTR_ERR(dat);
 
-       set = bgpio_map(pdev, "set", sz, &err);
-       if (err)
-               return err;
+       set = bgpio_map(pdev, "set", sz);
+       if (IS_ERR(set))
+               return PTR_ERR(set);
 
-       clr = bgpio_map(pdev, "clr", sz, &err);
-       if (err)
-               return err;
+       clr = bgpio_map(pdev, "clr", sz);
+       if (IS_ERR(clr))
+               return PTR_ERR(clr);
 
-       dirout = bgpio_map(pdev, "dirout", sz, &err);
-       if (err)
-               return err;
+       dirout = bgpio_map(pdev, "dirout", sz);
+       if (IS_ERR(dirout))
+               return PTR_ERR(dirout);
 
-       dirin = bgpio_map(pdev, "dirin", sz, &err);
-       if (err)
-               return err;
+       dirin = bgpio_map(pdev, "dirin", sz);
+       if (IS_ERR(dirin))
+               return PTR_ERR(dirin);
 
        bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
        if (!bgc)