Re: [PATCH] KVM: Fix PCI header check on device assignment

[Marcelo Tosatti <mtosatti@xxxxxxxxxx>]

On Thu, Jun 14, 2012 at 01:48:28PM -0600, Alex Williamson wrote:
> Avi, Marcelo,
> 
> Can we get this in for 3.5 please?  There's already an ack from me on
> the list.  Thanks,
> 
> Alex

Can you bounce it to me please ?

> On Tue, 2012-06-05 at 10:37 +0200, Jan Kiszka wrote:
> > The masking was wrong (must have been 0x7f), and there is no need to
> > re-read the value as pci_setup_device already does this for us.
> > 
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43339
> > Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> > ---
> >  virt/kvm/assigned-dev.c |    4 +---
> >  1 files changed, 1 insertions(+), 3 deletions(-)
> > 
> > diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
> > index 01f572c..b1e091a 100644
> > --- a/virt/kvm/assigned-dev.c
> > +++ b/virt/kvm/assigned-dev.c
> > @@ -635,7 +635,6 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
> >  	int r = 0, idx;
> >  	struct kvm_assigned_dev_kernel *match;
> >  	struct pci_dev *dev;
> > -	u8 header_type;
> >  
> >  	if (!(assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU))
> >  		return -EINVAL;
> > @@ -668,8 +667,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
> >  	}
> >  
> >  	/* Don't allow bridges to be assigned */
> > -	pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
> > -	if ((header_type & PCI_HEADER_TYPE) != PCI_HEADER_TYPE_NORMAL) {
> > +	if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) {
> >  		r = -EPERM;
> >  		goto out_put;
> >  	}
> 
> 
> 
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