From ad5acb43e5e5dc72a8d629235b6181a9f6e389f0 Mon Sep 17 00:00:00 2001
From: "Micon, David" <DMicon@pelco.com>
Date: Sat, 20 May 2006 14:59:59 -0700
Subject: [PATCH] [PATCH] HID read busywait fix

Make a read of a HID device block until data is available.  Without it, the
read goes into a busy-wait loop until data is available.

Cc: Greg KH <greg@kroah.com>
Acked-by: Vojtech Pavlik <vojtech@suse.cz>
Cc: Dmitry Torokhov <dtor_core@ameritech.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/usb/input/hiddev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/input/hiddev.c b/drivers/usb/input/hiddev.c
index 6dd6666961787..c4670e1d46545 100644
--- a/drivers/usb/input/hiddev.c
+++ b/drivers/usb/input/hiddev.c
@@ -317,6 +317,7 @@ static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t coun
 				}
 
 				schedule();
+				set_current_state(TASK_INTERRUPTIBLE);
 			}
 
 			set_current_state(TASK_RUNNING);
-- 
2.39.5