linux-kernel - [PATCH] V4L: dvb-usb, add extra sync to down-up input events

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Date:	Sun, 14 Feb 2010 21:36:25 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	mchehab@...hat.com
Cc:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Dmitry Torokhov <dtor@...l.ru>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: [PATCH] V4L: dvb-usb, add extra sync to down-up input events

Userspace is allowed to coalesce events between SYNCs. And since the code
emits UP right after DOWN for the same key, it may be missed
(up+down=nothing). Add an extra sync in between UP and DOWN events to disable
the coalesce.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Dmitry Torokhov <dtor@...l.ru>
Cc: Mauro Carvalho Chehab <mchehab@...radead.org>
Cc: linux-media@...r.kernel.org
---
 drivers/media/dvb/dvb-usb/dib0700_core.c   |    1 +
 drivers/media/dvb/dvb-usb/dvb-usb-remote.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
index 4450214..4f961d2 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_core.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -612,6 +612,7 @@ static void dib0700_rc_urb_completion(struct urb *purb)
 	case REMOTE_KEY_REPEAT:
 		deb_info("key repeated\n");
 		input_event(d->rc_input_dev, EV_KEY, event, 1);
+		input_sync(d->rc_input_dev);
 		input_event(d->rc_input_dev, EV_KEY, d->last_event, 0);
 		input_sync(d->rc_input_dev);
 		break;
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
index 6b5ded9..a03ef7e 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -107,6 +107,7 @@ static void dvb_usb_read_remote_control(struct work_struct *work)
 		case REMOTE_KEY_REPEAT:
 			deb_rc("key repeated\n");
 			input_event(d->rc_input_dev, EV_KEY, event, 1);
+			input_sync(d->rc_input_dev);
 			input_event(d->rc_input_dev, EV_KEY, d->last_event, 0);
 			input_sync(d->rc_input_dev);
 			break;
-- 
1.6.6.1

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