diff options
Diffstat (limited to 'drivers/platform/x86/xiaomi-wmi.c')
| -rw-r--r-- | drivers/platform/x86/xiaomi-wmi.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/platform/x86/xiaomi-wmi.c b/drivers/platform/x86/xiaomi-wmi.c index 54a2546bb93b..cbed29ca502a 100644 --- a/drivers/platform/x86/xiaomi-wmi.c +++ b/drivers/platform/x86/xiaomi-wmi.c @@ -2,8 +2,10 @@ /* WMI driver for Xiaomi Laptops */ #include <linux/acpi.h> +#include <linux/device.h> #include <linux/input.h> #include <linux/module.h> +#include <linux/mutex.h> #include <linux/wmi.h> #include <uapi/linux/input-event-codes.h> @@ -20,14 +22,23 @@ struct xiaomi_wmi { struct input_dev *input_dev; + struct mutex key_lock; /* Protects the key event sequence */ unsigned int key_code; }; +static void xiaomi_mutex_destroy(void *data) +{ + struct mutex *lock = data; + + mutex_destroy(lock); +} + static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context) { struct xiaomi_wmi *data; + int ret; - if (wdev == NULL || context == NULL) + if (!context) return -EINVAL; data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL); @@ -35,6 +46,11 @@ static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context) return -ENOMEM; dev_set_drvdata(&wdev->dev, data); + mutex_init(&data->key_lock); + ret = devm_add_action_or_reset(&wdev->dev, xiaomi_mutex_destroy, &data->key_lock); + if (ret < 0) + return ret; + data->input_dev = devm_input_allocate_device(&wdev->dev); if (data->input_dev == NULL) return -ENOMEM; @@ -50,19 +66,14 @@ static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context) static void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy) { - struct xiaomi_wmi *data; - - if (wdev == NULL) - return; - - data = dev_get_drvdata(&wdev->dev); - if (data == NULL) - return; + struct xiaomi_wmi *data = dev_get_drvdata(&wdev->dev); + mutex_lock(&data->key_lock); input_report_key(data->input_dev, data->key_code, 1); input_sync(data->input_dev); input_report_key(data->input_dev, data->key_code, 0); input_sync(data->input_dev); + mutex_unlock(&data->key_lock); } static const struct wmi_device_id xiaomi_wmi_id_table[] = { @@ -83,6 +94,7 @@ static struct wmi_driver xiaomi_wmi_driver = { .id_table = xiaomi_wmi_id_table, .probe = xiaomi_wmi_probe, .notify = xiaomi_wmi_notify, + .no_singleton = true, }; module_wmi_driver(xiaomi_wmi_driver); |