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From: Stefano Stabellini on 24 May 2010 14:30
the VIRQ_TIMER handler and virq handlers in general don't have any
chip_data.

Signed-off-by: Stefano Stabellini <stefano.stabellini(a)eu.citrix.com>
---
arch/x86/kernel/apic/io_apic.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index c64499c..4d3d391 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1269,6 +1269,8 @@ void __setup_vector_irq(int cpu)
/* Mark the inuse vectors */
for_each_irq_desc(irq, desc) {
cfg = desc->chip_data;
+ if (!cfg)
+ continue;

/*
* If it is a legacy IRQ handled by the legacy PIC, this cpu
--
1.5.4.3

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Prev: [PATCH 08/11] Fix possible NULL pointer dereference in print_IO_APIC
Next: [PATCH 04/11] Fix find_unbound_irq in presence of ioapic irqs.