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authorOliver Neukum <oliver@neukum.org>2008-09-02 14:16:11 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2008-10-17 14:40:54 -0700
commitd1b1944085ab2345fae4a5fbb614f1a4d0732d3e (patch)
tree14335e7979e03eb54772d763aeff755a8b5ddba0 /Documentation
parent4a511bc3f5829bc18428bcf11c25417a79d09396 (diff)
downloadlinux-linaro-stable-d1b1944085ab2345fae4a5fbb614f1a4d0732d3e.tar.gz
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/usb/anchors.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/usb/anchors.txt b/Documentation/usb/anchors.txt
index 5e6b64c20d25..6f24f566955a 100644
--- a/Documentation/usb/anchors.txt
+++ b/Documentation/usb/anchors.txt
@@ -52,6 +52,11 @@ Therefore no guarantee is made that the URBs have been unlinked when
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 @@ This function waits for all URBs associated with an anchor to finish
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