Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 22:21:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

HID: wacom: devres manage the shared data too

Browse Source 
wacom_release_shared_data() and wacom_remove_shared_data() are moved up
so they can be referenced in wacom_add_shared_data().

There is no point in explicitly setting wacom_wac1->shared->type to 0 in
wacom_wireless_work() (plus this would give an oops).

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2016-07-13 18:05:59 +02:00 committed by Jiri Kosina
parent 19b6433001
commit 1c817c83e8
1 changed files with 39 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
drivers/hid/wacom_sys.c
View File

@ -567,6 +567,38 @@ static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
return NULL;
}
static void wacom_release_shared_data(struct kref *kref)
{
struct wacom_hdev_data *data =
container_of(kref, struct wacom_hdev_data, kref);
mutex_lock(&wacom_udev_list_lock);
list_del(&data->list);
mutex_unlock(&wacom_udev_list_lock);
kfree(data);
}
static void wacom_remove_shared_data(void *res)
{
struct wacom *wacom = res;
struct wacom_hdev_data *data;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
if (wacom_wac->shared) {
data = container_of(wacom_wac->shared, struct wacom_hdev_data,
shared);
if (wacom_wac->shared->touch == wacom->hdev)
wacom_wac->shared->touch = NULL;
else if (wacom_wac->shared->pen == wacom->hdev)
wacom_wac->shared->pen = NULL;
kref_put(&data->kref, wacom_release_shared_data);
wacom_wac->shared = NULL;
}
}
static int wacom_add_shared_data(struct hid_device *hdev)
{
struct wacom *wacom = hid_get_drvdata(hdev);
@ -591,6 +623,13 @@ static int wacom_add_shared_data(struct hid_device *hdev)
wacom_wac->shared = &data->shared;
retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
if (retval) {
mutex_unlock(&wacom_udev_list_lock);
wacom_remove_shared_data(wacom);
return retval;
}
if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
wacom_wac->shared->touch = hdev;
else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
@ -601,37 +640,6 @@ out:
return retval;
}
static void wacom_release_shared_data(struct kref *kref)
{
struct wacom_hdev_data *data =
container_of(kref, struct wacom_hdev_data, kref);
mutex_lock(&wacom_udev_list_lock);
list_del(&data->list);
mutex_unlock(&wacom_udev_list_lock);
kfree(data);
}
static void wacom_remove_shared_data(struct wacom *wacom)
{
struct wacom_hdev_data *data;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
if (wacom_wac->shared) {
data = container_of(wacom_wac->shared, struct wacom_hdev_data,
shared);
if (wacom_wac->shared->touch == wacom->hdev)
wacom_wac->shared->touch = NULL;
else if (wacom_wac->shared->pen == wacom->hdev)
wacom_wac->shared->pen = NULL;
kref_put(&data->kref, wacom_release_shared_data);
wacom_wac->shared = NULL;
}
}
static int wacom_led_control(struct wacom *wacom)
{
unsigned char *buf;
@ -1731,7 +1739,6 @@ fail_remote:
fail_leds:
fail_register_inputs:
fail_battery:
wacom_remove_shared_data(wacom);
fail_shared_data:
fail_parsed:
fail_allocate_inputs:
@ -1771,7 +1778,6 @@ static void wacom_wireless_work(struct work_struct *work)
if (wacom_wac->pid == 0) {
hid_info(wacom->hdev, "wireless tablet disconnected\n");
wacom_wac1->shared->type = 0;
} else {
const struct hid_device_id *id = wacom_ids;
@ -1912,7 +1918,6 @@ static void wacom_remove(struct hid_device *hdev)
kobject_put(wacom->remote_dir);
if (hdev->bus == BUS_BLUETOOTH)
device_remove_file(&hdev->dev, &dev_attr_speed);
wacom_remove_shared_data(wacom);
hid_set_drvdata(hdev, NULL);
}