handle = rcu_dereference(dev->grab);
if (handle) {
- count = handle->handler->events(handle, vals, count);
+ count = handle->handle_events(handle, vals, count);
} else {
list_for_each_entry_rcu(handle, &dev->h_list, d_node)
if (handle->open) {
- count = handle->handler->events(handle, vals,
- count);
+ count = handle->handle_events(handle, vals,
+ count);
if (!count)
break;
}
wake_up(&input_devices_poll_wait);
}
+struct input_seq_state {
+ unsigned short pos;
+ bool mutex_acquired;
+ int input_devices_state;
+};
+
static __poll_t input_proc_devices_poll(struct file *file, poll_table *wait)
{
+ struct seq_file *seq = file->private_data;
+ struct input_seq_state *state = seq->private;
+
poll_wait(file, &input_devices_poll_wait, wait);
- if (file->f_version != input_devices_state) {
- file->f_version = input_devices_state;
+ if (state->input_devices_state != input_devices_state) {
+ state->input_devices_state = input_devices_state;
return EPOLLIN | EPOLLRDNORM;
}
return 0;
}
-union input_seq_state {
- struct {
- unsigned short pos;
- bool mutex_acquired;
- };
- void *p;
-};
-
static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
{
- union input_seq_state *state = (union input_seq_state *)&seq->private;
+ struct input_seq_state *state = seq->private;
int error;
- /* We need to fit into seq->private pointer */
- BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private));
-
error = mutex_lock_interruptible(&input_mutex);
if (error) {
state->mutex_acquired = false;
static void input_seq_stop(struct seq_file *seq, void *v)
{
- union input_seq_state *state = (union input_seq_state *)&seq->private;
+ struct input_seq_state *state = seq->private;
if (state->mutex_acquired)
mutex_unlock(&input_mutex);
static int input_proc_devices_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &input_devices_seq_ops);
+ return seq_open_private(file, &input_devices_seq_ops,
+ sizeof(struct input_seq_state));
}
static const struct proc_ops input_devices_proc_ops = {
.proc_poll = input_proc_devices_poll,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
- .proc_release = seq_release,
+ .proc_release = seq_release_private,
};
static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
{
- union input_seq_state *state = (union input_seq_state *)&seq->private;
+ struct input_seq_state *state = seq->private;
int error;
- /* We need to fit into seq->private pointer */
- BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private));
-
error = mutex_lock_interruptible(&input_mutex);
if (error) {
state->mutex_acquired = false;
static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- union input_seq_state *state = (union input_seq_state *)&seq->private;
+ struct input_seq_state *state = seq->private;
state->pos = *pos + 1;
return seq_list_next(v, &input_handler_list, pos);
static int input_handlers_seq_show(struct seq_file *seq, void *v)
{
struct input_handler *handler = container_of(v, struct input_handler, node);
- union input_seq_state *state = (union input_seq_state *)&seq->private;
+ struct input_seq_state *state = seq->private;
seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name);
if (handler->filter)
static int input_proc_handlers_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &input_handlers_seq_ops);
+ return seq_open_private(file, &input_handlers_seq_ops,
+ sizeof(struct input_seq_state));
}
static const struct proc_ops input_handlers_proc_ops = {
.proc_open = input_proc_handlers_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
- .proc_release = seq_release,
+ .proc_release = seq_release_private,
};
static int __init input_proc_init(void)
return 0;
}
- /*
- * An implementation of input_handler's events() method that simply
- * invokes handler->event() method for each event one by one.
- */
- static unsigned int input_handler_events_default(struct input_handle *handle,
- struct input_value *vals,
- unsigned int count)
- {
- struct input_handler *handler = handle->handler;
- struct input_value *v;
-
- for (v = vals; v != vals + count; v++)
- handler->event(handle, v->type, v->code, v->value);
-
- return count;
- }
-
- /*
- * An implementation of input_handler's events() method that invokes
- * handler->filter() method for each event one by one and removes events
- * that were filtered out from the "vals" array.
- */
- static unsigned int input_handler_events_filter(struct input_handle *handle,
- struct input_value *vals,
- unsigned int count)
- {
- struct input_handler *handler = handle->handler;
- struct input_value *end = vals;
- struct input_value *v;
-
- for (v = vals; v != vals + count; v++) {
- if (handler->filter(handle, v->type, v->code, v->value))
- continue;
- if (end != v)
- *end = *v;
- end++;
- }
-
- return end - vals;
- }
-
- /*
- * An implementation of input_handler's events() method that does nothing.
- */
- static unsigned int input_handler_events_null(struct input_handle *handle,
- struct input_value *vals,
- unsigned int count)
- {
- return count;
- }
-
/**
* input_register_handler - register a new input handler
* @handler: handler to be registered
INIT_LIST_HEAD(&handler->h_list);
- if (handler->filter)
- handler->events = input_handler_events_filter;
- else if (handler->event)
- handler->events = input_handler_events_default;
- else if (!handler->events)
- handler->events = input_handler_events_null;
-
error = mutex_lock_interruptible(&input_mutex);
if (error)
return error;
}
EXPORT_SYMBOL(input_handler_for_each_handle);
+ /*
+ * An implementation of input_handle's handle_events() method that simply
+ * invokes handler->event() method for each event one by one.
+ */
+ static unsigned int input_handle_events_default(struct input_handle *handle,
+ struct input_value *vals,
+ unsigned int count)
+ {
+ struct input_handler *handler = handle->handler;
+ struct input_value *v;
+
+ for (v = vals; v != vals + count; v++)
+ handler->event(handle, v->type, v->code, v->value);
+
+ return count;
+ }
+
+ /*
+ * An implementation of input_handle's handle_events() method that invokes
+ * handler->filter() method for each event one by one and removes events
+ * that were filtered out from the "vals" array.
+ */
+ static unsigned int input_handle_events_filter(struct input_handle *handle,
+ struct input_value *vals,
+ unsigned int count)
+ {
+ struct input_handler *handler = handle->handler;
+ struct input_value *end = vals;
+ struct input_value *v;
+
+ for (v = vals; v != vals + count; v++) {
+ if (handler->filter(handle, v->type, v->code, v->value))
+ continue;
+ if (end != v)
+ *end = *v;
+ end++;
+ }
+
+ return end - vals;
+ }
+
+ /*
+ * An implementation of input_handle's handle_events() method that does nothing.
+ */
+ static unsigned int input_handle_events_null(struct input_handle *handle,
+ struct input_value *vals,
+ unsigned int count)
+ {
+ return count;
+ }
+
+ /*
+ * Sets up appropriate handle->event_handler based on the input_handler
+ * associated with the handle.
+ */
+ static void input_handle_setup_event_handler(struct input_handle *handle)
+ {
+ struct input_handler *handler = handle->handler;
+
+ if (handler->filter)
+ handle->handle_events = input_handle_events_filter;
+ else if (handler->event)
+ handle->handle_events = input_handle_events_default;
+ else if (handler->events)
+ handle->handle_events = handler->events;
+ else
+ handle->handle_events = input_handle_events_null;
+ }
+
/**
* input_register_handle - register a new input handle
* @handle: handle to register
struct input_dev *dev = handle->dev;
int error;
+ input_handle_setup_event_handler(handle);
/*
* We take dev->mutex here to prevent race with
* input_release_device().