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| author | Oliver Neukum <oliver@neukum.org> | 2010-07-01 18:01:50 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-07-03 22:13:23 +0200 |
| commit | 866d7d7b4a4e1d502b136bcc8af605091fe4c7b5 (patch) | |
| tree | 770e175bfcea2de9156630c2c91611d8d4dad1b8 /drivers/input/input.c | |
| parent | Input: ads7846 - extend the driver for ads7845 controller support (diff) | |
| download | linux-866d7d7b4a4e1d502b136bcc8af605091fe4c7b5.tar.xz linux-866d7d7b4a4e1d502b136bcc8af605091fe4c7b5.zip | |
Input: release pressed keys when resuming device
As the kernel has no way to know whether a key was released
while the system was asleep, keys need to be reported released
as the system is resumed, lest autorepeat set in.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/input.c')
| -rw-r--r-- | drivers/input/input.c | 39 |
1 files changed, 29 insertions, 10 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index 9c79bd56b51a..240ad39da570 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -528,12 +528,30 @@ void input_close_device(struct input_handle *handle) EXPORT_SYMBOL(input_close_device); /* + * Simulate keyup events for all keys that are marked as pressed. + * The function must be called with dev->event_lock held. + */ +static void input_dev_release_keys(struct input_dev *dev) +{ + int code; + + if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { + for (code = 0; code <= KEY_MAX; code++) { + if (is_event_supported(code, dev->keybit, KEY_MAX) && + __test_and_clear_bit(code, dev->key)) { + input_pass_event(dev, EV_KEY, code, 0); + } + } + input_pass_event(dev, EV_SYN, SYN_REPORT, 1); + } +} + +/* * Prepare device for unregistering */ static void input_disconnect_device(struct input_dev *dev) { struct input_handle *handle; - int code; /* * Mark device as going away. Note that we take dev->mutex here @@ -552,15 +570,7 @@ static void input_disconnect_device(struct input_dev *dev) * generate events even after we done here but they will not * reach any handlers. */ - if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { - for (code = 0; code <= KEY_MAX; code++) { - if (is_event_supported(code, dev->keybit, KEY_MAX) && - __test_and_clear_bit(code, dev->key)) { - input_pass_event(dev, EV_KEY, code, 0); - } - } - input_pass_event(dev, EV_SYN, SYN_REPORT, 1); - } + input_dev_release_keys(dev); list_for_each_entry(handle, &dev->h_list, d_node) handle->open = 0; @@ -1433,6 +1443,15 @@ static int input_dev_resume(struct device *dev) mutex_lock(&input_dev->mutex); input_dev_reset(input_dev, true); + + /* + * Keys that have been pressed at suspend time are unlikely + * to be still pressed when we resume. + */ + spin_lock_irq(&input_dev->event_lock); + input_dev_release_keys(input_dev); + spin_unlock_irq(&input_dev->event_lock); + mutex_unlock(&input_dev->mutex); return 0; |