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HID: i2c-hid: remove custom locking from i2c_hid_open/close 

Now that HID core enforces serialization of transport driver open/close
calls we can remove custom locking from i2c-hid driver.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Dmitry Torokhov 2017-06-06 23:59:35 -07:00 committed by Jiri Kosina
parent aaac082dac
commit 85ae911331
1 changed files with 9 additions and 23 deletions
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32
drivers/hid/i2c-hid/i2c-hid.c
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@ -743,18 +743,12 @@ static int i2c_hid_open(struct hid_device *hid)
struct i2c_hid *ihid = i2c_get_clientdata(client);
int ret = 0;
mutex_lock(&i2c_hid_open_mut);
if (!hid->open++) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
hid->open--;
goto done;
}
set_bit(I2C_HID_STARTED, &ihid->flags);
}
done:
mutex_unlock(&i2c_hid_open_mut);
return ret < 0 ? ret : 0;
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0)
return ret;
set_bit(I2C_HID_STARTED, &ihid->flags);
return 0;
}
static void i2c_hid_close(struct hid_device *hid)
@ -762,18 +756,10 @@ static void i2c_hid_close(struct hid_device *hid)
struct i2c_client *client = hid->driver_data;
struct i2c_hid *ihid = i2c_get_clientdata(client);
/* protecting hid->open to make sure we don't restart
* data acquistion due to a resumption we no longer
* care about
*/
mutex_lock(&i2c_hid_open_mut);
if (!--hid->open) {
clear_bit(I2C_HID_STARTED, &ihid->flags);
clear_bit(I2C_HID_STARTED, &ihid->flags);
/* Save some power */
pm_runtime_put(&client->dev);
}
mutex_unlock(&i2c_hid_open_mut);
/* Save some power */
pm_runtime_put(&client->dev);
}
static int i2c_hid_power(struct hid_device *hid, int lvl)