linux-kernel - quirk_usb_disable_ehci takes 2x 1.5s on boot

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Date:	Mon, 05 Jan 2009 14:41:11 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	David Brownell <dbrownell@...rs.sourceforge.net>
CC:	USB list <linux-usb@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: quirk_usb_disable_ehci takes 2x 1.5s on boot

Hi,

I don't know since which moment (maybe I changed something in bios, but usb
legacy kbd was ever enabled), but quirk_usb_disable_ehci takes for both of my
ehci controllers 1.5 s.

More precisely, the time is spent in
pci_write_config_byte(pdev, offset + 3, 1);
by
outb((u8)value, 0xCFC + (reg & 3));
from pci_conf1_write deep in the callstack.

Is there any workaround known or something. Turning legacy usb off is not an
option, I want to control grub.

Thanks.
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