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spapr_pci: Fix DRC owner in spapr_dt_pci_bus() 

spapr_dt_drc() scans the aliases of all DRConnector objects and filters
the ones that it will use to generate OF properties according to their
owner and type.

Passing bus->parent_dev _works_ if bus belongs to a PCI bridge, but it is
NULL if it is the PHB's root bus. This causes all allocated PCI DRCs to
be associated to all PHBs (visible in their "ibm,drc-types" properties).
As a consequence, hot unplugging a PHB results in PCI devices from the
other PHBs to be unplugged as well, and likely confuses the guest.

Use the same logic as in add_drcs() to ensure the correct owner is passed
to spapr_dt_drc().

Fixes: 14e714900f "spapr: Allow hot plug/unplug of PCI bridges and devices under PCI bridges"
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <156084737348.512412.3552825999605902691.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-06-18 10:42:53 +02:00 committed by David Gibson
parent 2a17583082
commit 7e10b57dd9
1 changed files with 8 additions and 1 deletions
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9
hw/ppc/spapr_pci.c
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@ -1343,6 +1343,7 @@ static void spapr_dt_pci_device_cb(PCIBus *bus, PCIDevice *pdev,
static int spapr_dt_pci_bus(SpaprPhbState *sphb, PCIBus *bus,
void *fdt, int offset)
{
Object *owner;
PciWalkFdt cbinfo = {
.fdt = fdt,
.offset = offset,
@ -1363,7 +1364,13 @@ static int spapr_dt_pci_bus(SpaprPhbState *sphb, PCIBus *bus,
return cbinfo.err;
}
ret = spapr_dt_drc(fdt, offset, OBJECT(bus->parent_dev),
if (pci_bus_is_root(bus)) {
owner = OBJECT(sphb);
} else {
owner = OBJECT(pci_bridge_get_device(bus));
}
ret = spapr_dt_drc(fdt, offset, owner,
SPAPR_DR_CONNECTOR_TYPE_PCI);
if (ret) {
return ret;