kexec: Avoid migration of already disabled irqs (ia64)
This patch fixes up ia64 kexec support for HP rx2620 hardware. It does this
by skipping migration of already disabled irqs. This is most likely a problem
on other ia64 platforms as well, but I've only tested this on one machine
so far.
The full story is that handle_bad_irq() gets invoked before starting the new
kernel without this patch. This seems to happen when fixup_irqs() calls
generic_handle_irq() on already migrated (and disabled) irqs. So by avoiding
migration of disabled irqs we stay away of handle_bad_irq().
Signed-off-by: Magnus Damm <magnus@xxxxxxxxxxxxx>
---
Tested using kexec-tools-testing 7792798a79b78a5d566f70c9f00237d050b01350
on HP rx2620 hardware.
Applies on top of 2.6.20-rc6.
arch/ia64/kernel/irq.c | 3 +++
1 file changed, 3 insertions(+)
--- 0001/arch/ia64/kernel/irq.c
+++ 0004/arch/ia64/kernel/irq.c 2007-01-30 12:35:10.000000000 +0900
@@ -122,6 +122,9 @@ static void migrate_irqs(void)
for (irq=0; irq < NR_IRQS; irq++) {
desc = irq_desc + irq;
+ if (desc->status == IRQ_DISABLED)
+ continue;
+
/*
* No handling for now.
* TBD: Implement a disable function so we can now
-
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