ChangeSet 1.1734, 2004/05/17 15:34:21-07:00, oliver@neukum.org

[PATCH] USB: new delay helper safe wrt waitqueues

this is a new waiting helper safe even if we are left on a waitqueue.
This version addresses Alan's concerns about ifdefs. Please apply.

  - add delay helper that is safe even if we are still on another waitqueue


 drivers/usb/core/usb.c |   11 +++++++++++
 include/linux/usb.h    |    2 ++
 2 files changed, 13 insertions(+)


diff -Nru a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
--- a/drivers/usb/core/usb.c	Mon May 17 16:37:22 2004
+++ b/drivers/usb/core/usb.c	Mon May 17 16:37:22 2004
@@ -1483,6 +1483,16 @@
 	return 0;
 }
 
+void usb_uninterruptible_sleep_ms(int msecs)
+{
+	long timeout = msecs_to_jiffies(msecs);
+	
+	while(timeout) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		timeout = schedule_timeout(timeout);
+	}
+}
+
 struct bus_type usb_bus_type = {
 	.name =		"usb",
 	.match =	usb_device_match,
@@ -1600,6 +1610,7 @@
 EXPORT_SYMBOL(usb_disconnect);
 
 EXPORT_SYMBOL(__usb_get_extra_descriptor);
+EXPORT_SYMBOL(usb_uninterruptible_sleep_ms);
 
 EXPORT_SYMBOL(usb_find_device);
 EXPORT_SYMBOL(usb_get_current_frame_number);
diff -Nru a/include/linux/usb.h b/include/linux/usb.h
--- a/include/linux/usb.h	Mon May 17 16:37:22 2004
+++ b/include/linux/usb.h	Mon May 17 16:37:22 2004
@@ -31,6 +31,8 @@
 		mdelay(ms);
 }
 
+void usb_uninterruptible_sleep_ms(int msecs);
+
 struct usb_device;
 struct usb_driver;