USB: EHCI: add pointer to end of async-unlink list

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This patch (as1570) adds a pointer for the end of ehci-hcd's
async-unlink list.  The list (which is actually a queue) is singly
linked, so having a pointer to its end makes adding new entries easier
-- there's no longer any need to scan through the whole list.

In principle it could be changed to a standard doubly-linked list.  It
turns out that doing so actually makes the code less clear, so I'm
leaving it as is.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Alan Stern 2012-07-11 11:21:43 -04:00 • committed by Greg Kroah-Hartman

parent 99ac5b1e95

commit 2f5bb665ba

3 changed files with 5 additions and 7 deletions

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9

drivers/usb/host/ehci-hcd.c

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2

drivers/usb/host/ehci-q.c

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1

drivers/usb/host/ehci.h

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