tree e1dde22b7aa1ac3566ebbbd29b78df611e05c572
parent 7655e3160c78a18c2ecf7bf4dee0bbfe58575c7f
author Alan Stern <stern@rowland.harvard.edu> 1363973505 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1364243705 -0700

USB: EHCI: convert singly-linked lists to list_heads

This patch (as1664) converts ehci-hcd's async_unlink, async_iaa, and
intr_unlink from singly-linked lists to standard doubly-linked
list_heads.  Originally it didn't seem necessary to use list_heads,
because items are always added to and removed from these lists in FIFO
order.  But now with more list processing going on, it's easier to use
the standard routines than continue with a roll-your-own approach.

I don't know if the code ends up being notably shorter, but the
patterns will be more familiar to any kernel hacker.

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