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.tissoi...@redhat.com>
Acked-by: Ping Cheng <pi...@wacom.com>
Signed-off-by: Jiri Kosina <jkos...@suse.cz>
[aaron.sko...@wacom.com: Imported into input-wacom repository (1c817c8)]
Signed-off-by: Aaron Armstrong Skomra <aaron.sko...@wacom.com>
[aaron.sko...@wacom.com: Backported from input-wacom repository (561e444)]
Signed-off-by: Aaron Armstrong Skomra <aaron.sko...@wacom.com>
---
3.17/wacom_sys.c | 72 ++++++++++++++++++++++++++++++--------------------------
1 file changed, 39 insertions(+), 33 deletions(-)
diff --git a/3.17/wacom_sys.c b/3.17/wacom_sys.c
index 070cdaf..c26a1b4 100644
--- a/3.17/wacom_sys.c
+++ b/3.17/wacom_sys.c
@@ -571,6 +571,38 @@ 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);
@@ -595,6 +627,13 @@ 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)
@@ -605,37 +644,6 @@ 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;
@@ -1782,7 +1790,6 @@ fail_register_inputs:
wacom_destroy_battery(wacom);
#endif
fail_battery:
- wacom_remove_shared_data(wacom);
fail_shared_data:
fail_parsed:
fail_allocate_inputs:
@@ -1822,7 +1829,6 @@ 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;
--
2.7.4
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