The change "PCI: assign ioapic resource at hotplug" (commit
23186279658cea6d42a050400d3e79c56cb459b4 in Linus's tree) makes
networking stop working on my system (SuperMicro H8QC8 with four
dual-core Opteron 885 CPUs). In particular, the on-board NIC stops
working, probably because it gets assigned the wrong IRQ (225 in the
non-working case, 217 in the working case)
With that patch applied, e1000 doesn't work. Reverting just that
patch (shown below) from Linus's latest tree fixes things for me.
Please let me know what other debug information might be useful.
Thanks,
Roland
Here's the patch I revert. I'm not sure what it's trying to do, or
why it breaks my systems. But anyway, reverting this fixes things for
me:
Author: Satoru Takeuchi <[email protected]>
Date: Tue Sep 12 10:21:44 2006 -0700
PCI: assign ioapic resource at hotplug
We need to assign resources to ioapics being hot-added. This patch
changes pbus_assign_resources_sorted() to assign resources if the
ioapic has no assigned resources.
Signed-off-by: Kenji Kaneshige <[email protected]>
Signed-off-by: MUNEDA Takahiro <[email protected]>
Signed-off-by: Satoru Takeuchi <[email protected]>
Signed-off-by: Kristen Carlson Accardi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 47c1071..5440491 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -55,12 +55,19 @@ pbus_assign_resources_sorted(struct pci_
list_for_each_entry(dev, &bus->devices, bus_list) {
u16 class = dev->class >> 8;
- /* Don't touch classless devices or host bridges or ioapics. */
+ /* Don't touch classless devices or host bridges. */
if (class == PCI_CLASS_NOT_DEFINED ||
- class == PCI_CLASS_BRIDGE_HOST ||
- class == PCI_CLASS_SYSTEM_PIC)
+ class == PCI_CLASS_BRIDGE_HOST)
continue;
+ /* Don't touch ioapics if it has the assigned resources. */
+ if (class == PCI_CLASS_SYSTEM_PIC) {
+ res = &dev->resource[0];
+ if (res[0].start || res[1].start || res[2].start ||
+ res[3].start || res[4].start || res[5].start)
+ continue;
+ }
+
pdev_sort_resources(dev, &head);
}
-
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