From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: markh@compro.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: Opterons and setting the pci bus master bit
Date: Fri, 30 Sep 2005 19:19:02 +0100 [thread overview]
Message-ID: <1128104342.17099.67.camel@localhost.localdomain> (raw)
In-Reply-To: <433D71A0.1040104@compro.net>
On Gwe, 2005-09-30 at 13:10 -0400, Mark Hounschell wrote:
> everything is fine. When we connect the same chassis to an Intel P4 box
> everything is fine. It looks like it is the kernel that sets this bit
> because we have never set it in any of our drivers, yet on the intel
> boxes it gets set. Why would this bit not be set when the chassis is
> connected to an Opteron. We are running 32-bit mode BTW. I am using a
> 2.6.11.9 kernel. Is this a motherboard problem or could this be a kernel
> problem?
If your device needs to bus master you need to call
pci_set_master(pci_dev). The bus mastering setup prior to that really
depends on the BIOS and phase of the moon.
See Documentation/pci.txt
Alan
next prev parent reply other threads:[~2005-09-30 17:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-30 17:10 Opterons and setting the pci bus master bit Mark Hounschell
2005-09-30 17:32 ` linux-os (Dick Johnson)
2005-10-02 8:54 ` Benjamin Herrenschmidt
2005-09-30 18:19 ` Alan Cox [this message]
2005-09-30 18:29 ` Mark Hounschell
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