From: Maciej W. Rozycki <macro@linux-mips.org>
Date: Wed, 21 May 2008 21:09:26 +0000 (+0100)
Subject: x86: I/O APIC: clean up after a fasteoi failure
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e67465f1298671266a8e824c1751afdb7c08c860;p=linux-beck.git

x86: I/O APIC: clean up after a fasteoi failure

Disable the 8259A when routing of the timer interrupt through the chip to
the local APIC of the primary processor has failed.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 61cf366d040f..e7b7655c4e94 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -2228,6 +2228,7 @@ static inline void __init check_timer(void)
 		printk(" works.\n");
 		goto out;
 	}
+	disable_8259A_irq(0);
 	apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
 	printk(" failed.\n");
 
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 9f16ca4b5a24..6433fc99f1f9 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -1729,6 +1729,7 @@ static inline void __init check_timer(void)
 		apic_printk(APIC_VERBOSE," works.\n");
 		goto out;
 	}
+	disable_8259A_irq(0);
 	apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
 	apic_printk(APIC_VERBOSE," failed.\n");