From: Oliver Neukum Date: Tue, 2 Sep 2008 12:16:11 +0000 (+0200) Subject: USB: Documentation/usb/anchors.txt #2 X-Git-Tag: v2.6.28-rc1~254^2~72 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d1b1944085ab2345fae4a5fbb614f1a4d0732d3e;p=linux-2.6-omap-h63xx.git USB: Documentation/usb/anchors.txt #2 This adds Documentation for the extensions of the anchor API. Signed-off-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/usb/anchors.txt b/Documentation/usb/anchors.txt index 5e6b64c20d2..6f24f566955 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