linux-kernel - Re: [patch 19/26] USB: mutual exclusion for EHCI init and port resets

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Date:	Mon, 19 Nov 2007 11:59:55 -0800
From:	David Brownell <david-b@...bell.net>
To:	stern@...land.harvard.edu
Cc:	zwane@....linux.org.uk, tytso@....edu,
	torvalds@...ux-foundation.org, stable@...nel.org,
	reviews@...cw.f00f.org, rdunlap@...otime.net, mkrufky@...uxtv.org,
	linux-usb-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, jmforbes@...uxtx.org, gregkh@...e.de,
	dely.l.sy@...el.com, davem@...emloft.net, davej@...hat.com,
	chuckw@...ntumlinux.com, cebbert@...hat.com, cavokz@...il.com,
	alan@...rguk.ukuu.org.uk, akpm@...ux-foundation.org
Subject: Re: [patch 19/26] USB: mutual exclusion for EHCI init and port resets

> This addition certainly won't hurt.  Did we ever get any feedback as to 
> whether it actually helped?

ISTR that davem refused to try it, after reporting an
intermittent failure on the original patch (which only
addresses one end of that hardware race).

So, no ... but given we know that closing only one side
of the race isn't quite enough, I think we need it anyway.

- Dave

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