Hi, Am I missing something or is this just code to get the the resource subsystem to accept the bus resources, not caring if the resources are actually usable? PCI BARs usually have a given size for a reason? - Kjetil Oftedal On 12/01/2015, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: > Some bios put range that is not fully coverred by root bus resources. > Try to clip them and update them in pci bridge bars. > > We'd like to fix other arches instead of just x86. > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=85491 > Reported-by: Marek Kordik <kordikmarek@xxxxxxxxx> > Fixes: 5b28541552ef ("PCI: Restrict 64-bit prefetchable bridge windows to > 64-bit resources") > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> > Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> > Cc: Yijing Wang <wangyijing@xxxxxxxxxx> > Cc: Sam Ravnborg <sam@xxxxxxxxxxxx> > Cc: sparclinux@xxxxxxxxxxxxxxx > --- > arch/sparc/kernel/pci.c | 20 +++++++++++++++++++- > 1 file changed, 19 insertions(+), 1 deletion(-) > > diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c > index b36365f..0e391e5 100644 > --- a/arch/sparc/kernel/pci.c > +++ b/arch/sparc/kernel/pci.c > @@ -623,6 +623,7 @@ static void pci_claim_bus_resources(struct pci_bus > *bus) > struct pci_dev *dev; > > list_for_each_entry(dev, &bus->devices, bus_list) { > + bool changed = false; > int i; > > for (i = 0; i < PCI_NUM_RESOURCES; i++) { > @@ -639,8 +640,25 @@ static void pci_claim_bus_resources(struct pci_bus > *bus) > (unsigned long long)r->end, > (unsigned int)r->flags); > > - pci_claim_resource(dev, i); > + if (pci_claim_resource(dev, i) >= 0) > + continue; > + > + if (dev->subordinate && > + i >= PCI_BRIDGE_RESOURCES && > + i < PCI_NUM_RESOURCES && > + (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && > + pci_bus_clip_resource(dev, r)) { > + changed = true; > + pci_claim_resource(dev, i); > + } else if (i < PCI_BRIDGE_RESOURCES && > + i != PCI_ROM_RESOURCE && > + pci_bus_clip_resource(dev, r)) { > + pci_update_resource(dev, i); > + pci_claim_resource(dev, i); > + } > } > + if (changed) > + pci_setup_bridge(dev->subordinate); > } > > list_for_each_entry(child_bus, &bus->children, node) > -- > 1.8.4.5 > > -- > To unsubscribe from this list: send the line "unsubscribe sparclinux" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
