From: Fernando Luis VazquezCao <fernando@oss.ntt.co.jp>
Date: Wed, 2 May 2007 17:27:17 +0000 (+0200)
Subject: [PATCH] x86-64: use safe_apic_wait_icr_idle in smpboot.c - x86_64
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=3144c332fa2ee4c4b9804aae5fe31098f04bffd9;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] x86-64: use safe_apic_wait_icr_idle in smpboot.c - x86_64

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/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index f2a234b390e8..082f478fb777 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -391,7 +391,8 @@ static void inquire_remote_apic(int apicid)
 {
 	unsigned i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
 	char *names[] = { "ID", "VERSION", "SPIV" };
-	int timeout, status;
+	int timeout;
+	unsigned int status;
 
 	printk(KERN_INFO "Inquiring remote APIC #%d...\n", apicid);
 
@@ -401,7 +402,9 @@ static 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(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
 		apic_write(APIC_ICR, APIC_DM_REMRD | regs[i]);