Input: pm8xxx-vibrator - switch to using managed resources

Simplify the error paths and reduce the lines of code in this
driver by using the devm_* APIs.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 12 insertions, 31 deletions

diff --git a/drivers/input/misc/pm8xxx-vibrator.c b/drivers/input/misc/pm8xxx-vibrator.c
index ec086f6f3cc3..50be8abb7d0c 100644
--- a/drivers/input/misc/pm8xxx-vibrator.c
+++ b/drivers/input/misc/pm8xxx-vibrator.c
@@ -186,13 +186,13 @@ static int pm8xxx_vib_probe(struct platform_device *pdev)
         int error;
         u8 val;
 
-        vib = kzalloc(sizeof(*vib), GFP_KERNEL);
-        input_dev = input_allocate_device();
-        if (!vib || !input_dev) {
-                dev_err(&pdev->dev, "couldn't allocate memory\n");
-                error = -ENOMEM;
-                goto err_free_mem;
-        }
+        vib = devm_kzalloc(&pdev->dev, sizeof(*vib), GFP_KERNEL);
+        if (!vib)
+                return -ENOMEM;
+
+        input_dev = devm_input_allocate_device(&pdev->dev);
+        if (!input_dev)
+                return -ENOMEM;
 
         INIT_WORK(&vib->work, pm8xxx_work_handler);
         vib->dev = &pdev->dev;
@@ -201,17 +201,17 @@ static int pm8xxx_vib_probe(struct platform_device *pdev)
         /* operate in manual mode */
         error = pm8xxx_vib_read_u8(vib, &val, VIB_DRV);
         if (error < 0)
-                goto err_free_mem;
+                return error;
+
         val &= ~VIB_DRV_EN_MANUAL_MASK;
         error = pm8xxx_vib_write_u8(vib, val, VIB_DRV);
         if (error < 0)
-                goto err_free_mem;
+                return error;
 
         vib->reg_vib_drv = val;
 
         input_dev->name = "pm8xxx_vib_ffmemless";
         input_dev->id.version = 1;
-        input_dev->dev.parent = &pdev->dev;
         input_dev->close = pm8xxx_vib_close;
         input_set_drvdata(input_dev, vib);
         input_set_capability(vib->vib_input_dev, EV_FF, FF_RUMBLE);
@@ -221,35 +221,17 @@ static int pm8xxx_vib_probe(struct platform_device *pdev)
         if (error) {
                 dev_err(&pdev->dev,
                         "couldn't register vibrator as FF device\n");
-                goto err_free_mem;
+                return error;
         }
 
         error = input_register_device(input_dev);
         if (error) {
                 dev_err(&pdev->dev, "couldn't register input device\n");
-                goto err_destroy_memless;
+                return error;
         }
 
         platform_set_drvdata(pdev, vib);
         return 0;
-
-err_destroy_memless:
-        input_ff_destroy(input_dev);
-err_free_mem:
-        input_free_device(input_dev);
-        kfree(vib);
-
-        return error;
-}
-
-static int pm8xxx_vib_remove(struct platform_device *pdev)
-{
-        struct pm8xxx_vib *vib = platform_get_drvdata(pdev);
-
-        input_unregister_device(vib->vib_input_dev);
-        kfree(vib);
-
-        return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -268,7 +250,6 @@ static SIMPLE_DEV_PM_OPS(pm8xxx_vib_pm_ops, pm8xxx_vib_suspend, NULL);
 
 static struct platform_driver pm8xxx_vib_driver = {
         .probe          = pm8xxx_vib_probe,
-        .remove         = pm8xxx_vib_remove,
         .driver         = {
                 .name   = "pm8xxx-vib",
                 .owner  = THIS_MODULE,