Re: [patch] add input_enable_device()

[Stas Sergeev <stsp@aknet.ru>]

Hello.

Andrew Morton wrote:
> iirc it had to do with the pc-speaker driver, but I don't seem to be able
> to locate the original email.
OK, sorry, I haven't realized its important.

---
The patch below adds input_enable_device() and input_disable_device()
to the input subsystem, that allows to enable and disable the input
devices. The reason to have it, is the snd-pcsp PC-Speaker driver in
an ALSA tree that needs an ability to disable the pcspkr driver.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
CC: Dmitry Torokhov <dtor_core@ameritech.net>
CC: Vojtech Pavlik <vojtech@suse.cz>

--- a/include/linux/input.h	2006-04-05 17:10:01.000000000 +0400
+++ b/include/linux/input.h	2006-04-05 17:36:49.000000000 +0400
@@ -878,7 +878,7 @@
 
 	struct pt_regs *regs;
 	int state;
-
+	int disabled;
 	int sync;
 
 	int abs[ABS_MAX + 1];
@@ -1038,6 +1038,9 @@
 int input_open_device(struct input_handle *);
 void input_close_device(struct input_handle *);
 
+void input_enable_device(struct input_handle *handle);
+void input_disable_device(struct input_handle *handle);
+
 int input_accept_process(struct input_handle *handle, struct file *file);
 int input_flush_device(struct input_handle* handle, struct file* file);
 
--- a/drivers/input/input.c	2006-01-12 11:23:09.000000000 +0300
+++ b/drivers/input/input.c	2006-04-05 17:51:27.000000000 +0400
@@ -37,6 +37,8 @@
 EXPORT_SYMBOL(input_release_device);
 EXPORT_SYMBOL(input_open_device);
 EXPORT_SYMBOL(input_close_device);
+EXPORT_SYMBOL(input_enable_device);
+EXPORT_SYMBOL(input_disable_device);
 EXPORT_SYMBOL(input_accept_process);
 EXPORT_SYMBOL(input_flush_device);
 EXPORT_SYMBOL(input_event);
@@ -53,7 +55,7 @@
 {
 	struct input_handle *handle;
 
-	if (type > EV_MAX || !test_bit(type, dev->evbit))
+	if (type > EV_MAX || !test_bit(type, dev->evbit) || dev->disabled)
 		return;
 
 	add_input_randomness(type, code, value);
@@ -269,6 +271,16 @@
 	mutex_unlock(&dev->mutex);
 }
 
+void input_enable_device(struct input_handle *handle)
+{
+	handle->dev->disabled = 0;
+}
+
+void input_disable_device(struct input_handle *handle)
+{
+	handle->dev->disabled = 1;
+}
+
 static void input_link_handle(struct input_handle *handle)
 {
 	list_add_tail(&handle->d_node, &handle->dev->h_list);