Input: sgi_btns - switch to using managed resources

Switching to devm API allows to clean up error handling paths and drop
the remove() method.

Link: https://lore.kernel.org/r/20191017204217.106453-14-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/misc/sgi_btns.c b/drivers/input/misc/sgi_btns.c
index 0fee6dd..829277b 100644 (file)
--- a/drivers/input/misc/sgi_btns.c
+++ b/drivers/input/misc/sgi_btns.c
@@ -45,7 +45,6 @@ static const unsigned short sgi_map[] = {
 };
 
 struct buttons_dev {
-       struct input_polled_dev *poll_dev;
        unsigned short keymap[ARRAY_SIZE(sgi_map)];
        int count[ARRAY_SIZE(sgi_map)];
 };
@@ -84,12 +83,13 @@ static int sgi_buttons_probe(struct platform_device *pdev)
        struct input_dev *input;
        int error, i;
 
-       bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
-       poll_dev = input_allocate_polled_device();
-       if (!bdev || !poll_dev) {
-               error = -ENOMEM;
-               goto err_free_mem;
-       }
+       bdev = devm_kzalloc(&pdev->dev, sizeof(*bdev), GFP_KERNEL);
+       if (!bdev)
+               return -ENOMEM;
+
+       poll_dev = devm_input_allocate_polled_device(&pdev->dev);
+       if (!poll_dev)
+               return -ENOMEM;
 
        memcpy(bdev->keymap, sgi_map, sizeof(bdev->keymap));
 
@@ -101,7 +101,6 @@ static int sgi_buttons_probe(struct platform_device *pdev)
        input->name = "SGI buttons";
        input->phys = "sgi/input0";
        input->id.bustype = BUS_HOST;
-       input->dev.parent = &pdev->dev;
 
        input->keycode = bdev->keymap;
        input->keycodemax = ARRAY_SIZE(bdev->keymap);
@@ -113,35 +112,15 @@ static int sgi_buttons_probe(struct platform_device *pdev)
                __set_bit(bdev->keymap[i], input->keybit);
        __clear_bit(KEY_RESERVED, input->keybit);
 
-       bdev->poll_dev = poll_dev;
-       platform_set_drvdata(pdev, bdev);
-
        error = input_register_polled_device(poll_dev);
        if (error)
-               goto err_free_mem;
-
-       return 0;
-
- err_free_mem:
-       input_free_polled_device(poll_dev);
-       kfree(bdev);
-       return error;
-}
-
-static int sgi_buttons_remove(struct platform_device *pdev)
-{
-       struct buttons_dev *bdev = platform_get_drvdata(pdev);
-
-       input_unregister_polled_device(bdev->poll_dev);
-       input_free_polled_device(bdev->poll_dev);
-       kfree(bdev);
+               return error;
 
        return 0;
 }
 
 static struct platform_driver sgi_buttons_driver = {
        .probe  = sgi_buttons_probe,
-       .remove = sgi_buttons_remove,
        .driver = {
                .name   = "sgibtns",
        },