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Message-ID: <20150226014818.GA2469@dtor-ws>
Date: Wed, 25 Feb 2015 17:48:18 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: linux-input@...r.kernel.org
Cc: Stefan Sauer <ensonic@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] Input: mma8450 - convert to using managed resources
This simplifies error handling and device removal code. Also let's
get rid of setting driver's owner since i2c core does it for us.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
Note that the following removal was intentional as
devm_input_allocate_polled_device() does this for us:
- idev->input->dev.parent = &c->dev;
drivers/input/misc/mma8450.c | 35 ++++++++---------------------------
1 file changed, 8 insertions(+), 27 deletions(-)
diff --git a/drivers/input/misc/mma8450.c b/drivers/input/misc/mma8450.c
index 9822877..19c7357 100644
--- a/drivers/input/misc/mma8450.c
+++ b/drivers/input/misc/mma8450.c
@@ -174,12 +174,13 @@ static int mma8450_probe(struct i2c_client *c,
struct mma8450 *m;
int err;
- m = kzalloc(sizeof(struct mma8450), GFP_KERNEL);
- idev = input_allocate_polled_device();
- if (!m || !idev) {
- err = -ENOMEM;
- goto err_free_mem;
- }
+ m = devm_kzalloc(&c->dev, sizeof(*m), GFP_KERNEL);
+ if (!m)
+ return -ENOMEM;
+
+ idev = devm_input_allocate_polled_device(&c->dev);
+ if (!idev)
+ return -ENOMEM;
m->client = c;
m->idev = idev;
@@ -187,7 +188,6 @@ static int mma8450_probe(struct i2c_client *c,
idev->private = m;
idev->input->name = MMA8450_DRV_NAME;
idev->input->id.bustype = BUS_I2C;
- idev->input->dev.parent = &c->dev;
idev->poll = mma8450_poll;
idev->poll_interval = POLL_INTERVAL;
idev->poll_interval_max = POLL_INTERVAL_MAX;
@@ -202,29 +202,12 @@ static int mma8450_probe(struct i2c_client *c,
err = input_register_polled_device(idev);
if (err) {
dev_err(&c->dev, "failed to register polled input device\n");
- goto err_free_mem;
+ return err;
}
i2c_set_clientdata(c, m);
return 0;
-
-err_free_mem:
- input_free_polled_device(idev);
- kfree(m);
- return err;
-}
-
-static int mma8450_remove(struct i2c_client *c)
-{
- struct mma8450 *m = i2c_get_clientdata(c);
- struct input_polled_dev *idev = m->idev;
-
- input_unregister_polled_device(idev);
- input_free_polled_device(idev);
- kfree(m);
-
- return 0;
}
static const struct i2c_device_id mma8450_id[] = {
@@ -242,11 +225,9 @@ MODULE_DEVICE_TABLE(of, mma8450_dt_ids);
static struct i2c_driver mma8450_driver = {
.driver = {
.name = MMA8450_DRV_NAME,
- .owner = THIS_MODULE,
.of_match_table = mma8450_dt_ids,
},
.probe = mma8450_probe,
- .remove = mma8450_remove,
.id_table = mma8450_id,
};
--
2.2.0.rc0.207.ga3a616c
--
Dmitry
--
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