linux-kernel - [PATCH] x86: Don't ack_APIC_irq() if lapic is disabled in GENERIC_INTERRUPT

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Message-Id: <1252403546-12544-1-git-send-email-sheng@linux.intel.com>
Date:	Tue,  8 Sep 2009 17:52:26 +0800
From:	Sheng Yang <sheng@...ux.intel.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, Sheng Yang <sheng@...ux.intel.com>,
	Dimitri Sivanich <sivanich@....com>
Subject: [PATCH] x86: Don't ack_APIC_irq() if lapic is disabled in GENERIC_INTERRUPT_VECTOR handler

Otherwise would cause trouble...

Cc: Dimitri Sivanich <sivanich@....com>
Signed-off-by: Sheng Yang <sheng@...ux.intel.com>
---
 arch/x86/kernel/irq.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index b0cdde6..78b23d0 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -257,7 +257,8 @@ void smp_generic_interrupt(struct pt_regs *regs)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
-	ack_APIC_irq();
+	if (!disable_apic)
+		ack_APIC_irq();
 
 	exit_idle();
 
-- 
1.5.4.5

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