Make sure that all mouse buttons are released when clients

using /dev/consolectl close. This fixes a problem where if
a USB mouse is detached while a button is pressed, that
button is never released.

MFC after:	1 week

1 files changed, 20 insertions, 1 deletions

diff --git a/sys/dev/syscons/syscons.c b/sys/dev/syscons/syscons.c
index beb0c67..8094ea3 100644
--- a/sys/dev/syscons/syscons.c
+++ b/sys/dev/syscons/syscons.c
@@ -253,11 +253,13 @@ static struct ttydevsw sc_ttydevsw = {
 };
 
 static d_ioctl_t	consolectl_ioctl;
+static d_close_t	consolectl_close;
 
 static struct cdevsw consolectl_devsw = {
 	.d_version	= D_VERSION,
-	.d_flags	= D_NEEDGIANT,
+	.d_flags	= D_NEEDGIANT | D_TRACKCLOSE,
 	.d_ioctl	= consolectl_ioctl,
+	.d_close	= consolectl_close,
 	.d_name		= "consolectl",
 };
 
@@ -1561,6 +1563,23 @@ consolectl_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
 	return sctty_ioctl(dev->si_drv1, cmd, data, td);
 }
 
+static int
+consolectl_close(struct cdev *dev, int flags, int mode, struct thread *td)
+{
+#ifndef SC_NO_SYSMOUSE
+	mouse_info_t info;
+	memset(&info, 0, sizeof(info));
+	info.operation = MOUSE_ACTION;
+
+	/*
+	 * Make sure all buttons are released when moused and other
+	 * console daemons exit, so that no buttons are left pressed.
+	 */
+	(void) sctty_ioctl(dev->si_drv1, CONS_MOUSECTL, (caddr_t)&info, td);
+#endif
+	return (0);
+}
+
 static void
 sc_cnprobe(struct consdev *cp)
 {