linux-kernel - Re: [PATCH WIP 2/5] xen/arm: set xen_platform_pci_unplug to XEN_UNPLUG

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Message-ID: <alpine.DEB.2.02.1207041226150.31911@kaball.uk.xensource.com>
Date:	Wed, 4 Jul 2012 12:27:17 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	David Vrabel <david.vrabel@...rix.com>
CC:	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ian Campbell <Ian.Campbell@...rix.com>
Subject: Re: [PATCH WIP 2/5] xen/arm: set xen_platform_pci_unplug to
 XEN_UNPLUG_ALL

On Wed, 4 Jul 2012, David Vrabel wrote:
> On 04/07/12 12:15, Stefano Stabellini wrote:
> > Set xen_platform_pci_unplug to XEN_UNPLUG_ALL by default to make
> > blkfront happy. The parameter doesn't make sense on ARM and should be
> > removed.
> 
> Why is this parameter nonsensical on ARM?  ARM systems can have PCI devices.

Because we shouldn't assume the presence of a PCI bus on ARM. Moreover
it would be nice to avoid the ugly unplug protocol entirely if we can.
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