[PATCH v2 2/5] Input: adp5589: use device-managed function in adp5589_keypad_add()

From: Alexandru Ardelean
Date: Thu Nov 12 2020 - 02:38:36 EST


This change makes use of the devm_input_allocate_device() function, which
gets rid of the input_free_device() and input_unregister_device() calls.

When a device is allocated via input_allocate_device(), the
input_register_device() call will also be device-managed, so there is no
longer need to manually call unregister.

Also, the irq is allocated with the devm_request_threaded_irq(), so with
these two changes, the adp5589_keypad_remove() function is no longer
needed.

This cleans up the error & exit paths.
It also looks like the input_free_device() should have been called on the
remove() hook, but doesn't look like it is.

This change may also also fix some potential leaks that were probably
omitted earlier.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/input/keyboard/adp5589-keys.c | 47 +++++++--------------------
1 file changed, 11 insertions(+), 36 deletions(-)

diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c
index 922497b65ab0..e96ffd5ed69e 100644
--- a/drivers/input/keyboard/adp5589-keys.c
+++ b/drivers/input/keyboard/adp5589-keys.c
@@ -909,7 +909,7 @@ static int adp5589_keypad_add(struct adp5589_kpad *kpad, unsigned int revid)
return -EINVAL;
}

- input = input_allocate_device();
+ input = devm_input_allocate_device(&client->dev);
if (!input)
return -ENOMEM;

@@ -953,38 +953,19 @@ static int adp5589_keypad_add(struct adp5589_kpad *kpad, unsigned int revid)
__set_bit(kpad->gpimap[i].sw_evt, input->swbit);

error = input_register_device(input);
- if (error) {
- dev_err(&client->dev, "unable to register input device\n");
- goto err_free_input;
- }
+ if (error)
+ return error;

- error = request_threaded_irq(client->irq, NULL, adp5589_irq,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- client->dev.driver->name, kpad);
- if (error) {
- dev_err(&client->dev, "irq %d busy?\n", client->irq);
- goto err_unreg_dev;
- }
+ error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ adp5589_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ client->dev.driver->name, kpad);
+ if (error)
+ return error;

device_init_wakeup(&client->dev, 1);

return 0;
-
-err_unreg_dev:
- input_unregister_device(input);
- input = NULL;
-err_free_input:
- input_free_device(input);
-
- return error;
-}
-
-static void adp5589_keypad_remove(struct adp5589_kpad *kpad)
-{
- if (kpad->input) {
- free_irq(kpad->client->irq, kpad);
- input_unregister_device(kpad->input);
- }
}

static int adp5589_probe(struct i2c_client *client,
@@ -1041,24 +1022,19 @@ static int adp5589_probe(struct i2c_client *client,

error = adp5589_setup(kpad);
if (error)
- goto err_keypad_remove;
+ return error;

if (kpad->gpimapsize)
adp5589_report_switch_state(kpad);

error = adp5589_gpio_add(kpad);
if (error)
- goto err_keypad_remove;
+ return error;

i2c_set_clientdata(client, kpad);

dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
return 0;
-
-err_keypad_remove:
- adp5589_keypad_remove(kpad);
-
- return error;
}

static int adp5589_remove(struct i2c_client *client)
@@ -1066,7 +1042,6 @@ static int adp5589_remove(struct i2c_client *client)
struct adp5589_kpad *kpad = i2c_get_clientdata(client);

adp5589_write(client, kpad->var->reg(ADP5589_GENERAL_CFG), 0);
- adp5589_keypad_remove(kpad);
adp5589_gpio_remove(kpad);

return 0;
--
2.17.1