tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Oliver Neukum
and committed by
Greg Kroah-Hartman
d1b19440
4a511bc3
+17
+17
Documentation/usb/anchors.txt
+17
Documentation/usb/anchors.txt
···
52
52
the call returns. They may be unlinked later but will be unlinked in
53
53
finite time.
54
54
55
+
usb_scuttle_anchored_urbs()
56
+
---------------------------
57
+
58
+
All URBs of an anchor are unanchored en masse.
59
+
55
60
usb_wait_anchor_empty_timeout()
56
61
-------------------------------
57
62
···
64
59
or a timeout, whichever comes first. Its return value will tell you
65
60
whether the timeout was reached.
66
61
62
+
usb_anchor_empty()
63
+
------------------
67
64
65
+
Returns true if no URBs are associated with an anchor. Locking
66
+
is the caller's responsibility.
67
+
68
+
usb_get_from_anchor()
69
+
---------------------
70
+
71
+
Returns the oldest anchored URB of an anchor. The URB is unanchored
72
+
and returned with a reference. As you may mix URBs to several
73
+
destinations in one anchor you have no guarantee the chronologically
74
+
first submitted URB is returned.