From 4312fa8157f5ebdaf36e615cf40f9d7a6137a22c Mon Sep 17 00:00:00 2001
From: Fernando Luis VazquezCao <fernando@oss.ntt.co.jp>
Date: Wed, 2 May 2007 19:27:17 +0200
Subject: [PATCH] [PATCH] i386: use safe_apic_wait_icr_idle in smpboot.c
__inquire_remote_apic is used for APIC debugging, so use
safe_apic_wait_icr_idle instead of apic_wait_icr_idle to avoid possible
lockups when APIC delivery fails.
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/i386/kernel/smpboot.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 94dce14a1b37..a768eceeac37 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -521,7 +521,8 @@ static inline void __inquire_remote_apic(int apicid)
{
int i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
char *names[] = { "ID", "VERSION", "SPIV" };
- int timeout, status;
+ int timeout;
+ unsigned long status;
printk("Inquiring remote APIC #%d...\n", apicid);
@@ -531,7 +532,9 @@ static inline void __inquire_remote_apic(int apicid)
/*
* Wait for idle.
*/
- apic_wait_icr_idle();
+ status = safe_apic_wait_icr_idle();
+ if (status)
+ printk("a previous APIC delivery may have failed\n");
apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
apic_write_around(APIC_ICR, APIC_DM_REMRD | regs[i]);