From 30a589fde0162aa4dac7c69803aeee8fbe8d1b82 Mon Sep 17 00:00:00 2001 From: Adam Jackson Date: Tue, 5 Jan 2010 17:56:04 -0800 Subject: Input: evdev - be less aggressive about sending SIGIO notifies When using realtime signals, we'll enqueue one signal for every event. This is unfortunate, because (for example) keyboard presses are three events: key, msc scancode, and syn. They'll be enqueued fast enough in kernel space that all three events will be ready to read by the time userspace runs, so the first invocation of the signal handler will read all three events, but then the second two invocations still have to run to do no work. Instead, only send the SIGIO notification on syn events. This is a slight abuse of SIGIO semantics, in principle it ought to fire as soon as any events are readable. But it matches evdev semantics, which is more important since SIGIO is rather vaguely defined to begin with. Signed-off-by: Adam Jackson Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/input/evdev.c') diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index dee6706038aa..258c639571b5 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -59,7 +59,8 @@ static void evdev_pass_event(struct evdev_client *client, client->head &= EVDEV_BUFFER_SIZE - 1; spin_unlock(&client->buffer_lock); - kill_fasync(&client->fasync, SIGIO, POLL_IN); + if (event->type == EV_SYN) + kill_fasync(&client->fasync, SIGIO, POLL_IN); } /* -- cgit From 3d7bbd4575cfb23e6ef7368fff1f7d7e198b7930 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 4 Feb 2010 00:30:42 -0800 Subject: Input: mark input interfaces as non-seekable Seeking does not make sense for input interfaces such as evdev and joydev so let's use nonseekable_open to mark them non-seekable. Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/input/evdev.c') diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 258c639571b5..9f9816baeb97 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -278,6 +278,8 @@ static int evdev_open(struct inode *inode, struct file *file) goto err_free_client; file->private_data = client; + nonseekable_open(inode, file); + return 0; err_free_client: -- cgit From 58b939959d228681208ba997595411fddc860849 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Mon, 8 Mar 2010 22:37:10 -0800 Subject: Input: scancode in get/set_keycodes should be unsigned MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The HID layer has some scan codes of the form 0xffbc0000 for logitech devices which do not work if scancode is typed as signed int, so we need to switch to unsigned it instead. While at it keycode being signed does not make much sense either. Acked-by: Márton Németh Acked-by: Matthew Garrett Acked-by: Jiri Kosina Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/input/evdev.c') diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 9f9816baeb97..2ee6c7a68bdc 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -515,7 +515,7 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, struct input_absinfo abs; struct ff_effect effect; int __user *ip = (int __user *)p; - int i, t, u, v; + unsigned int i, t, u, v; int error; switch (cmd) { -- cgit