From: Fernando Luis VazquezCao <fernando@oss.ntt.co.jp>
Date: Wed, 2 May 2007 17:27:17 +0000 (+0200)
Subject: [PATCH] i386: use safe_apic_wait_icr_idle in smpboot.c
X-Git-Tag: v2.6.22-rc1~1011^2~54
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4312fa8157f5ebdaf36e615cf40f9d7a6137a22c;p=karo-tx-linux.git

[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>
---

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]);