This is a note to let you know that I've just added the patch titled
PCI: Delay final fixups until resources are assigned
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-delay-final-fixups-until-resources-are-assigned.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e253aaf0af51c1e4dc7dd3b26ea8e666bf9a2d8d Mon Sep 17 00:00:00 2001
From: Yinghai Lu <yinghai@xxxxxxxxxx>
Date: Tue, 7 May 2013 14:35:44 -0600
Subject: PCI: Delay final fixups until resources are assigned
From: Yinghai Lu <yinghai@xxxxxxxxxx>
commit e253aaf0af51c1e4dc7dd3b26ea8e666bf9a2d8d upstream.
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 <David.Bulkow@xxxxxxxxxxx>
Tested-by: David Bulkow <David.Bulkow@xxxxxxxxxxx>
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/bus.c | 1 +
drivers/pci/probe.c | 1 -
2 files changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -174,6 +174,7 @@ int pci_bus_add_device(struct pci_dev *d
* 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;
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1339,7 +1339,6 @@ void pci_device_add(struct pci_dev *dev,
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);
Patches currently in stable-queue which might be from yinghai@xxxxxxxxxx are
queue-3.9/pci-delay-final-fixups-until-resources-are-assigned.patch
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