From e253aaf0af51c1e4dc7dd3b26ea8e666bf9a2d8d Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Tue, 7 May 2013 14:35:44 -0600 Subject: [PATCH] PCI: Delay final fixups until resources are assigned Commit 4f535093cf "PCI: Put pci_dev in device tree as early as possible" moved final fixups from pci_bus_add_device() to pci_device_add(). But pci_device_add() happens before resource assignment, so BARs may not be valid yet. Typical flow for hot-add: pciehp_configure_device pci_scan_slot pci_scan_single_device pci_device_add pci_fixup_device(pci_fixup_final, dev) # previous location # resource assignment happens here pci_bus_add_devices pci_bus_add_device pci_fixup_device(pci_fixup_final, dev) # new location [bhelgaas: changelog, move fixups to pci_bus_add_device()] Reference: https://lkml.kernel.org/r/20130415182614.GB9224@xanatos Reported-by: David Bulkow Tested-by: David Bulkow Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas CC: stable@vger.kernel.org # v3.9+ --- drivers/pci/bus.c | 1 + drivers/pci/probe.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 748f8f3e9ff5..32e66a6f12d9 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -174,6 +174,7 @@ int pci_bus_add_device(struct pci_dev *dev) * Can not put in pci_device_add yet because resources * are not assigned yet for some devices. */ + pci_fixup_device(pci_fixup_final, dev); pci_create_sysfs_dev_files(dev); dev->match_driver = true; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 43ece5d41d36..67cd04575e2e 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1341,7 +1341,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) list_add_tail(&dev->bus_list, &bus->devices); up_write(&pci_bus_sem); - pci_fixup_device(pci_fixup_final, dev); ret = pcibios_add_device(dev); WARN_ON(ret < 0); -- 2.20.1