On 9/23/2022 2:37 PM, francisco.munoz.ruiz@xxxxxxxxxxxxxxx wrote: > From: Francisco Munoz <francisco.munoz.ruiz@xxxxxxxxxxxxxxx> > > The reset was never applied in the current implementation because Intel > Bridges owned by VMD are parentless. Internally, the reset API applies > a reset to the parent of the pci device supplied as argument, but in this > case it failed because there wasn't a parent. This change feeds a child > device of an Intel Bridge to the reset API and internally the reset is > applied to its parent. > > Signed-off-by: Francisco Munoz <francisco.munoz.ruiz@xxxxxxxxxxxxxxx> > Reviewed-by: Nirmal Patel <nirmal.patel@xxxxxxxxxxxxxxx> Reviewed-by: Jonathan Derrick <jonathan.derrick@xxxxxxxxx> > --- > drivers/pci/controller/vmd.c | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c > index e06e9f4fc50f..34d6ba675440 100644 > --- a/drivers/pci/controller/vmd.c > +++ b/drivers/pci/controller/vmd.c > @@ -859,8 +859,16 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) > > pci_scan_child_bus(vmd->bus); > vmd_domain_reset(vmd); > - list_for_each_entry(child, &vmd->bus->children, node) > - pci_reset_bus(child->self); > + > + list_for_each_entry(child, &vmd->bus->children, node) { > + if (!list_empty(&child->devices)) { > + pci_reset_bus(list_first_entry(&child->devices, > + struct pci_dev, > + bus_list)); > + break; > + } > + } > + > pci_assign_unassigned_bus_resources(vmd->bus); > > /*