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| author | Oliver Neukum <oliver@neukum.org> | 2008-09-02 14:16:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-17 14:40:54 -0700 |
| commit | d1b1944085ab2345fae4a5fbb614f1a4d0732d3e (patch) | |
| tree | 14335e7979e03eb54772d763aeff755a8b5ddba0 /Documentation/usb | |
| parent | 4a511bc3f5829bc18428bcf11c25417a79d09396 (diff) | |
| download | lwn-d1b1944085ab2345fae4a5fbb614f1a4d0732d3e.tar.gz lwn-d1b1944085ab2345fae4a5fbb614f1a4d0732d3e.zip | |
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/usb')
| -rw-r--r-- | Documentation/usb/anchors.txt | 17 |
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.
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