USB: Documentation/usb/anchors.txt #2
This adds Documentation for the extensions of the anchor API.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/Documentation/usb/anchors.txt b/Documentation/usb/anchors.txt
index 5e6b64c..6f24f56 100644
--- a/Documentation/usb/anchors.txt
+++ b/Documentation/usb/anchors.txt
@@ -52,6 +52,11 @@
the call returns. They may be unlinked later but will be unlinked in
finite time.
+usb_scuttle_anchored_urbs()
+---------------------------
+
+All URBs of an anchor are unanchored en masse.
+
usb_wait_anchor_empty_timeout()
-------------------------------
@@ -59,4 +64,16 @@
or a timeout, whichever comes first. Its return value will tell you
whether the timeout was reached.
+usb_anchor_empty()
+------------------
+Returns true if no URBs are associated with an anchor. Locking
+is the caller's responsibility.
+
+usb_get_from_anchor()
+---------------------
+
+Returns the oldest anchored URB of an anchor. The URB is unanchored
+and returned with a reference. As you may mix URBs to several
+destinations in one anchor you have no guarantee the chronologically
+first submitted URB is returned.
\ No newline at end of file