powerpc/crashdump: Do not fail on NULL pointer dereferencing

Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 6f4613d..341d8af 100644 (file)
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -375,6 +375,9 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
        for_each_irq(i) {
                struct irq_desc *desc = irq_to_desc(i);
 
+               if (!desc || !desc->chip || !desc->chip->eoi)
+                       continue;
+
                if (desc->status & IRQ_INPROGRESS)
                        desc->chip->eoi(i);