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-apple.c b/drivers/hid/hid-apple.c
index feae88b..bad40b9 100644
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -349,7 +349,7 @@
unsigned int connect_mask = HID_CONNECT_DEFAULT;
int ret;
- asc = kzalloc(sizeof(*asc), GFP_KERNEL);
+ asc = devm_kzalloc(&hdev->dev, sizeof(*asc), GFP_KERNEL);
if (asc == NULL) {
hid_err(hdev, "can't alloc apple descriptor\n");
return -ENOMEM;
@@ -362,7 +362,7 @@
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
- goto err_free;
+ return ret;
}
if (quirks & APPLE_HIDDEV)
@@ -373,19 +373,10 @@
ret = hid_hw_start(hdev, connect_mask);
if (ret) {
hid_err(hdev, "hw start failed\n");
- goto err_free;
+ return ret;
}
return 0;
-err_free:
- kfree(asc);
- return ret;
-}
-
-static void apple_remove(struct hid_device *hdev)
-{
- hid_hw_stop(hdev);
- kfree(hid_get_drvdata(hdev));
}
static const struct hid_device_id apple_devices[] = {
@@ -545,7 +536,6 @@
.id_table = apple_devices,
.report_fixup = apple_report_fixup,
.probe = apple_probe,
- .remove = apple_remove,
.event = apple_event,
.input_mapping = apple_input_mapping,
.input_mapped = apple_input_mapped,