[PATCH v13 10/12] PCI: Assign unassigned bus resources in pci_scan_root_bus()
From: yinghai@kernel.org (Yinghai Lu)
Date: 2014-09-29 18:25:22
Also in:
linux-arch, linux-devicetree, linux-pci, lkml
On Mon, Sep 29, 2014 at 7:29 AM, Liviu Dudau [off-list ref] wrote:
quoted hunk ↗ jump to hunk
If the firmware has not assigned all the bus resources and we are not just probing the PCI buses, it makes sense to assign the unassigned resources in pci_scan_root_bus(). Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Arnd Bergmann <arnd@arndb.de> CC: Jason Gunthorpe <redacted> CC: Rob Herring <robh+dt@kernel.org> --- drivers/pci/probe.c | 3 +++ 1 file changed, 3 insertions(+)diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 636d1c9..d2ebd49 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c@@ -1951,6 +1951,9 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, if (!found) pci_bus_update_busn_res_end(b, max); + if (!pci_has_flag(PCI_PROBE_ONLY)) + pci_assign_unassigned_bus_resources(b); + pci_bus_add_devices(b); return b; }
No, you can not do it that early. On x86, we need to call pcibios_resource_survey_bus at first. Thanks Yinghai