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From: Mark Hounschell <markh@compro.net>
To: linux-kernel@vger.kernel.org
Subject: Re: Opterons and setting the pci bus master bit
Date: Fri, 30 Sep 2005 14:29:03 -0400	[thread overview]
Message-ID: <433D83EF.8090501@compro.net> (raw)
In-Reply-To: <1128104342.17099.67.camel@localhost.localdomain>

Alan Cox wrote:
> 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
> 
> 

Ok, thats what I'll do then.

Thanks for the info.
Mark




      reply	other threads:[~2005-09-30 18:29 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
2005-09-30 18:29   ` Mark Hounschell [this message]

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