linux-kernel - Re: [PATCH 8/9] x86/amd-iommu: Search for existind dev

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Message-ID: <20110611102947.GC29908@amd.com>
Date:	Sat, 11 Jun 2011 12:29:47 +0200
From:	"Roedel, Joerg" <Joerg.Roedel@....com>
To:	Chris Wright <chrisw@...s-sol.org>
CC:	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/9] x86/amd-iommu: Search for existind dev_data before
 allocting a new one

On Fri, Jun 10, 2011 at 04:52:26PM -0400, Chris Wright wrote:
> * Joerg Roedel (joerg.roedel@....com) wrote:
> > +static struct iommu_dev_data *search_dev_data(u16 devid)
> > +{
> > +     struct iommu_dev_data *dev_data;
> > +     unsigned long flags;
> > +
> > +	spin_lock_irqsave(&dev_data_list_lock, flags);
> > +	list_for_each_entry(dev_data, &dev_data_list, dev_data_list) {
> > +		if (dev_data->devid == devid)

Right, multiple segments are not handled at all by the driver. The ACPI
tables support them in theory, but there are no systems to test those
things on.

	Joerg

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