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USB: update of Documentation/usb/anchors.txt

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The extended anchor API is documented

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2008-09-02 10:52:08 +02:00 committed by Greg Kroah-Hartman
parent 83a7982073
commit 697e04db56
1 changed files with 12 additions and 0 deletions
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Documentation/usb/anchors.txt
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@ -42,9 +42,21 @@ This function kills all URBs associated with an anchor. The URBs
are called in the reverse temporal order they were submitted.
This way no data can be reordered.
usb_unlink_anchored_urbs()
--------------------------
This function unlinks all URBs associated with an anchor. The URBs
are processed in the reverse temporal order they were submitted.
This is similar to usb_kill_anchored_urbs(), but it will not sleep.
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_wait_anchor_empty_timeout()
-------------------------------
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.