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authorDmitry Torokhov <dtor@insightbb.com>2006-11-02 23:26:55 -0500
committerDmitry Torokhov <dtor@insightbb.com>2006-11-02 23:26:55 -0500
commit1447190e39847cc2cc8a826e7061989c83ff4362 (patch)
tree22353af22bc854d8a203b3cb8a4281de607a48bd /drivers/input
parentb435fdcda126db42343b8055d04a0a27c229717b (diff)
Input: add comments to input_{allocate|free}_device()
Hopefully this will stop people from using input_free_device() incorrectly. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/input.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 1c8c8a5bc4a..7cf2b4f603a 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -37,7 +37,7 @@ static struct input_handler *input_table[8];
/**
* input_event() - report new input event
- * @handle: device that generated the event
+ * @dev: device that generated the event
* @type: type of the event
* @code: event code
* @value: value of the event
@@ -900,6 +900,15 @@ struct class input_class = {
};
EXPORT_SYMBOL_GPL(input_class);
+/**
+ * input_allocate_device - allocate memory for new input device
+ *
+ * Returns prepared struct input_dev or NULL.
+ *
+ * NOTE: Use input_free_device() to free devices that have not been
+ * registered; input_unregister_device() should be used for already
+ * registered devices.
+ */
struct input_dev *input_allocate_device(void)
{
struct input_dev *dev;
@@ -919,6 +928,20 @@ struct input_dev *input_allocate_device(void)
}
EXPORT_SYMBOL(input_allocate_device);
+/**
+ * input_free_device - free memory occupied by input_dev structure
+ * @dev: input device to free
+ *
+ * This function should only be used if input_register_device()
+ * was not called yet or if it failed. Once device was registered
+ * use input_unregister_device() and memory will be freed once last
+ * refrence to the device is dropped.
+ *
+ * Device should be allocated by input_allocate_device().
+ *
+ * NOTE: If there are references to the input device then memory
+ * will not be freed until last reference is dropped.
+ */
void input_free_device(struct input_dev *dev)
{
if (dev) {