From 9c8f3da69167f77e2e6b0814dbe6b257f2b9265a Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oliver@neukum.org>
Date: Thu, 10 Apr 2008 14:07:37 +0200
Subject: [PATCH] --- yaml --- r: 93354 b: refs/heads/master c:
 eda769593bbae8aee4e336b0732f6016353301a3 h: refs/heads/master v: v3

---
 [refs]                       |  2 +-
 trunk/drivers/usb/core/urb.c | 24 ++++++++++++++++++++++++
 trunk/include/linux/usb.h    |  1 +
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index b81a6e673b9b..0d7b23d82708 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9424ea29658ce5bcdcf527ddf9617b9507ddf1aa
+refs/heads/master: eda769593bbae8aee4e336b0732f6016353301a3
diff --git a/trunk/drivers/usb/core/urb.c b/trunk/drivers/usb/core/urb.c
index 9d7e63292c01..1d3ed1322fbe 100644
--- a/trunk/drivers/usb/core/urb.c
+++ b/trunk/drivers/usb/core/urb.c
@@ -589,6 +589,30 @@ void usb_kill_anchored_urbs(struct usb_anchor *anchor)
 }
 EXPORT_SYMBOL_GPL(usb_kill_anchored_urbs);
 
+/**
+ * usb_unlink_anchored_urbs - asynchronously cancel transfer requests en masse
+ * @anchor: anchor the requests are bound to
+ *
+ * this allows all outstanding URBs to be unlinked starting
+ * from the back of the queue. This function is asynchronous.
+ * The unlinking is just tiggered. It may happen after this
+ * function has returned.
+ */
+void usb_unlink_anchored_urbs(struct usb_anchor *anchor)
+{
+	struct urb *victim;
+
+	spin_lock_irq(&anchor->lock);
+	while (!list_empty(&anchor->urb_list)) {
+		victim = list_entry(anchor->urb_list.prev, struct urb,
+				    anchor_list);
+		/* this will unanchor the URB */
+		usb_unlink_urb(victim);
+	}
+	spin_unlock_irq(&anchor->lock);
+}
+EXPORT_SYMBOL_GPL(usb_unlink_anchored_urbs);
+
 /**
  * usb_wait_anchor_empty_timeout - wait for an anchor to be unused
  * @anchor: the anchor you want to become unused
diff --git a/trunk/include/linux/usb.h b/trunk/include/linux/usb.h
index dd9733cc0ac2..52c449e4bdcd 100644
--- a/trunk/include/linux/usb.h
+++ b/trunk/include/linux/usb.h
@@ -1451,6 +1451,7 @@ extern int usb_submit_urb(struct urb *urb, gfp_t mem_flags);
 extern int usb_unlink_urb(struct urb *urb);
 extern void usb_kill_urb(struct urb *urb);
 extern void usb_kill_anchored_urbs(struct usb_anchor *anchor);
+extern void usb_unlink_anchored_urbs(struct usb_anchor *anchor);
 extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor);
 extern void usb_unanchor_urb(struct urb *urb);
 extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor,