linux-kernel - [PATCH] [POWEPC] crashdump: do not fail on null pointer dereferencing

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Message-ID: <20100511154108.11546.12066.stgit@muvarov>
Date:	Tue, 11 May 2010 19:41:08 +0400
From:	Maxim Uvarov <muvarov@...il.com>
To:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	uvarov@....rtsoft.ru
Subject: [PATCH] [POWEPC] crashdump: do not fail on null pointer dereferencing

Best regards,
Maxim Uvarov.

From: Maxim Uvarov <muvarov@...il.com>

Signed-off-by: Maxim Uvarov <muvarov@...il.com>
---

 arch/powerpc/kernel/crash.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 6f4613d..341d8af 100644
--- 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);
 



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