[11/17] powerpc/crashdump: Do not fail on NULL pointer dereferencing

[Greg KH]

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Maxim Uvarov <muvarov@xxxxxxxxx>

commit 426b6cb478e60352a463a0d1ec75c1c9fab30b13 upstream.

Signed-off-by: Maxim Uvarov <muvarov@xxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Kamalesh babulal <kamalesh@xxxxxxxxxxxxxxxxxx>
cc: Anton Blanchard <anton@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/powerpc/kernel/crash.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -377,6 +377,9 @@ void default_machine_crash_shutdown(stru
 	for_each_irq(i) {
 		struct irq_desc *desc = irq_desc + i;
 
+		if (!desc || !desc->chip || !desc->chip->eoi)
+			continue;
+
 		if (desc->status & IRQ_INPROGRESS)
 			desc->chip->eoi(i);
 


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