Re: [PATCH 1/1] drivers/usb/host/pci-quirks.c: wait for EHCI handofffar too long in quirk_usb_disable_ehci()

[Alan Stern]

On Mon, 8 Sep 2008, Andrew Morton wrote:

> On Sat,  6 Sep 2008 17:29:53 -0700 Steven Noonan <steven.noonan@xxxxxxxxxxxxxx> wrote:
> 
> > This patch fixes a very noticeable bootup delay on some
> > systems (in my particular case, an HP dv5178us). The
> > problem is caused by a buggy BIOS which doesn't properly
> > announce that the handoff was completed.
> > 
> > The delay in the current version of pci-quirks.c is 5 seconds,
> > which I've cut down to 0.5 seconds.

> I guess it risks breaking someone else's system.  Or perhaps the number
> was just grabbed out of the air.

As far as I know, it was indeed just grabbed out of the air.  The spec 
specifically avoids giving an upper limit on how long to wait.

> Can we do a separate quirk just for that machine (and ones with the
> same bug)?

My BIOS has the same bug.  I wouldn't mind seeing the delay reduced.

Alan Stern

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