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authorMicon, David <DMicon@pelco.com>2006-05-20 14:59:59 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-21 12:59:17 -0700
commit48d705522da4fa04bb0169a7ca3c9ab92e28b613 (patch)
tree4863bac913553850e33a0cfc8f8dabd598214bf7
parent9ccfc29c671c9d0a83c2a114d4bc5f85f3cd749d (diff)
[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>
-rw-r--r--drivers/usb/input/hiddev.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/input/hiddev.c b/drivers/usb/input/hiddev.c
index 6dd66669617..c4670e1d465 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);