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authorFernando Luis VazquezCao <fernando@oss.ntt.co.jp>2007-05-02 19:27:17 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:17 +0200
commit3144c332fa2ee4c4b9804aae5fe31098f04bffd9 (patch)
treeb69b89eef10b169f8486c18cdaf374dd2339eba2 /arch/x86_64
parent4312fa8157f5ebdaf36e615cf40f9d7a6137a22c (diff)
[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>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/smpboot.c7
1 files changed, 5 insertions, 2 deletions
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]);