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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-12-04 10:22:23 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-12-07 09:26:35 -0800 |
| commit | 36203c4f3d091b5f6c082663bd1f74273798043a (patch) | |
| tree | bf5b6efee8f15aae253155263038ac538f7482e9 /drivers/input/input-polldev.c | |
| parent | 6a47081c37b7dd7810ce19e156c1a3bf11987e9a (diff) | |
| download | lwn-36203c4f3d091b5f6c082663bd1f74273798043a.tar.gz lwn-36203c4f3d091b5f6c082663bd1f74273798043a.zip | |
Input: add generic support for sparse keymaps
More and more devices choose to reimplement support for sparse keymaps
first introduced by wistron driver. Move it into a library module so it
can be easily used by interested parties.
Reviewed-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/input-polldev.c')
| -rw-r--r-- | drivers/input/input-polldev.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c index 6a2eb399b988..aa6713b4a988 100644 --- a/drivers/input/input-polldev.c +++ b/drivers/input/input-polldev.c @@ -212,7 +212,7 @@ EXPORT_SYMBOL(input_allocate_polled_device); * @dev: device to free * * The function frees memory allocated for polling device and drops - * reference to the associated input device (if present). + * reference to the associated input device. */ void input_free_polled_device(struct input_polled_dev *dev) { @@ -258,6 +258,15 @@ int input_register_polled_device(struct input_polled_dev *dev) return error; } + /* + * Take extra reference to the underlying input device so + * that it survives call to input_unregister_polled_device() + * and is deleted only after input_free_polled_device() + * has been invoked. This is needed to ease task of freeing + * sparse keymaps. + */ + input_get_device(input); + return 0; } EXPORT_SYMBOL(input_register_polled_device); @@ -269,8 +278,6 @@ EXPORT_SYMBOL(input_register_polled_device); * The function unregisters previously registered polled input * device from input layer. Polling is stopped and device is * ready to be freed with call to input_free_polled_device(). - * Callers should not attempt to access dev->input pointer - * after calling this function. */ void input_unregister_polled_device(struct input_polled_dev *dev) { @@ -278,7 +285,6 @@ void input_unregister_polled_device(struct input_polled_dev *dev) &input_polldev_attribute_group); input_unregister_device(dev->input); - dev->input = NULL; } EXPORT_SYMBOL(input_unregister_polled_device); |