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Diffstat (limited to 'Documentation/usb/anchors.txt')
| -rw-r--r-- | Documentation/usb/anchors.txt | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/usb/anchors.txt b/Documentation/usb/anchors.txt index 7304bcf5a30..6f24f566955 100644 --- a/Documentation/usb/anchors.txt +++ b/Documentation/usb/anchors.txt @@ -42,9 +42,38 @@ 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_scuttle_anchored_urbs() +--------------------------- + +All URBs of an anchor are unanchored en masse. + 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. + +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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