From: David Brownell <david-b@pacbell.net>
To: linux-usb-devel@lists.sourceforge.net
Subject: Re: [linux-usb-devel] Re: ATI RS480-based motherboard: stuck while booting with kernel >= 2.6.15 rc1
Date: Sun, 5 Feb 2006 11:45:22 -0800
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Cc: "Carlo E. Prelz" <fluido@fluido.as>, Andrew Morton <akpm@osdl.org>,
       linux-kernel@vger.kernel.org
References: <20060120123202.GA1138@epio.fluido.as> <20060122111112.GA15320@epio.fluido.as> <20060205103333.GA27735@epio.fluido.as>
In-Reply-To: <20060205103333.GA27735@epio.fluido.as>
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On Sunday 05 February 2006 2:33 am, Carlo E. Prelz wrote:
> In drivers/usb/host/pci-quirks.c, in function quirk_usb_disable_ehci
> (should start around line 211) there is a stanza that reads:
> 
> 			/* always say Linux will own the hardware
> 			 * by setting EHCI_USBLEGSUP_OS.
> 			 */
> 			pci_write_config_byte(pdev, offset + 3, 1);
> 
> On my sapphire athlon64 motherboard (see the thread for more details),
> this call never returns (without generating any output). I commented
> it out, and now the EHCI subsystem works OK (currently running
> 2.6.16rc2).

Interesting ... feels like a BIOS problem.  If you want to experiment,
there's a right bracket -- "}" -- immediately before that.  Try moving
it right after that write, so that write_config_byte is covered by the
preceding "if LEGSUP_BIOS" test; or copying the much later "disable SMI"
clause into an "else" for that "if".

- Dave
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