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x86/ioapic: Prevent NULL pointer dereference in setup_ioapic_dest()
[firefly-linux-kernel-4.4.55.git]
/
arch
/
x86
/
kernel
/
apic
/
io_apic.c
diff --git
a/arch/x86/kernel/apic/io_apic.c
b/arch/x86/kernel/apic/io_apic.c
index bb6bfc01cb82dd6ffbe4aa49e92020b2600584d6..4f2821527014e14eba4051c27d05dc53ffe958f3 100644
(file)
--- a/
arch/x86/kernel/apic/io_apic.c
+++ b/
arch/x86/kernel/apic/io_apic.c
@@
-2547,7
+2547,9
@@
void __init setup_ioapic_dest(void)
mask = apic->target_cpus();
chip = irq_data_get_irq_chip(idata);
- chip->irq_set_affinity(idata, mask, false);
+ /* Might be lapic_chip for irq 0 */
+ if (chip->irq_set_affinity)
+ chip->irq_set_affinity(idata, mask, false);
}
}
#endif