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Subject: Re: 2.4.2 yenta_socket problems on ThinkPad 240
To: torvalds@transmeta.com (Linus Torvalds)
Date: Sat, 16 Jun 2001 19:23:56 +0100 (BST)
Cc: jgarzik@mandrakesoft.com (Jeff Garzik), eric@brouhaha.com (Eric Smith),
        linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk (Alan Cox),
        arjanv@redhat.com, mj@ucw.cz
In-Reply-To: <Pine.LNX.4.21.0106161055040.9713-100000@penguin.transmeta.com> from "Linus Torvalds" at Jun 16, 2001 11:10:16 AM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> Cardbus shouldn't be touching the bus stuff at all, BUT there may be
> strange hardware that doesn't like the following:
> 
>         config_writeb(socket, PCI_SEC_LATENCY_TIMER, 176); 
> 	config_writeb(socket, PCI_PRIMARY_BUS, dev->bus->number);
>         config_writeb(socket, PCI_SECONDARY_BUS, dev->subordinate->number);
>         config_writeb(socket, PCI_SUBORDINATE_BUS, dev->subordinate->number);
> 
> I have heard rumors of PCI devices that want all these set with a single
> double-word write.

That would be consistent with the behaviour in the bugzilla report - it went
from 0,0,0,1 to  176,0,0,0...

Alan