HID: trivial devm conversion for special hid drivers
It is safe to use devres allocation within the hid subsystem:
- the devres release is called _after_ the call to .remove(), meaning
that no freed pointers will exists while removing the device
- if a .probe() fails, devres releases all the allocated ressources
before going to the next driver: there will not be ghost ressources
attached to a hid device if several drivers are probed.
Given that, we can clean up a little some of the HID drivers. These ones
are trivial:
- there is only one kzalloc in the driver
- the .remove() callback contains only one kfree on top of hid_hw_stop()
- the error path in the probe is easy enough to be manually checked
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 5bc3734..d393eb7 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -484,7 +484,7 @@
struct hid_report *report;
int ret;
- msc = kzalloc(sizeof(*msc), GFP_KERNEL);
+ msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
if (msc == NULL) {
hid_err(hdev, "can't alloc magicmouse descriptor\n");
return -ENOMEM;
@@ -498,13 +498,13 @@
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "magicmouse hid parse failed\n");
- goto err_free;
+ return ret;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "magicmouse hw start failed\n");
- goto err_free;
+ return ret;
}
if (!msc->input) {
@@ -548,19 +548,9 @@
return 0;
err_stop_hw:
hid_hw_stop(hdev);
-err_free:
- kfree(msc);
return ret;
}
-static void magicmouse_remove(struct hid_device *hdev)
-{
- struct magicmouse_sc *msc = hid_get_drvdata(hdev);
-
- hid_hw_stop(hdev);
- kfree(msc);
-}
-
static const struct hid_device_id magic_mice[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
@@ -574,7 +564,6 @@
.name = "magicmouse",
.id_table = magic_mice,
.probe = magicmouse_probe,
- .remove = magicmouse_remove,
.raw_event = magicmouse_raw_event,
.input_mapping = magicmouse_input_mapping,
.input_configured = magicmouse_input_configured,