From: Karsten Wiese <fzu@wemgehoertderstaat.de>
Date: Mon, 31 Dec 2007 05:55:05 +0000 (-0800)
Subject: USB: ehci saves some memory in ISO transfer descriptors
X-Git-Tag: v2.6.25-rc1~1075^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3b6fcfd0664aeac6ae2fd1231f04b3ed24723c1e;p=pandora-kernel.git

USB: ehci saves some memory in ISO transfer descriptors

In the EHCI driver, itd->usecs[8] is used in periodic_usecs(), indexed by
uframe.  For an ITD's unused uframes it is 0, else it contains the same
value as itd->stream->usecs.  To check if an ITD's uframe is used, we can
instead test itd->hw_transaction[uframe]:  if used, it will be nonzero no
matter what endianess is used.

This patch replaces those two uses, eliminates itd->usecs[], and saves
eight bytes from each ITD.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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