linux-kernel - [PATCH 09/12] __setup_vector_irq: handle NULL chip

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Date:	Thu,  3 Jun 2010 14:10:42 +0100
From:	stefano.stabellini@...citrix.com
To:	linux-kernel@...r.kernel.org
Cc:	Stefano.Stabellini@...citrix.com, xen-devel@...ts.xensource.com,
	jeremy@...p.org, ddutile@...hat.com, sheng@...ux.intel.com,
	Stefano Stabellini <stefano.stabellini@...citrix.com>
Subject: [PATCH 09/12] __setup_vector_irq: handle NULL chip_data

From: Stefano Stabellini <stefano.stabellini@...citrix.com>

the VIRQ_TIMER handler and virq handlers in general don't have any
chip_data.

Signed-off-by: Stefano Stabellini <stefano.stabellini@...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
-- 
1.7.0.4

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