[PATCH] i386: Handle non existing APICs without panicing

[deliverable/linux.git] / arch / i386 / kernel / mpparse.c

diff --git a/arch/i386/kernel/mpparse.c b/arch/i386/kernel/mpparse.c
index e7609abf3796354e3b5ee03e9e8de28c81679a6f..e6e2f43db85e25b22962292b11a76ca3624d16c7 100644 (file)
--- a/arch/i386/kernel/mpparse.c
+++ b/arch/i386/kernel/mpparse.c
@@ -915,6 +915,7 @@ void __init mp_register_ioapic (
        u32                     gsi_base)
 {
        int                     idx = 0;
+       int                     tmpid;
 
        if (nr_ioapics >= MAX_IO_APICS) {
                printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
@@ -935,9 +936,14 @@ void __init mp_register_ioapic (
 
        set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
        if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 < 15))
-               mp_ioapics[idx].mpc_apicid = io_apic_get_unique_id(idx, id);
+               tmpid = io_apic_get_unique_id(idx, id);
        else
-               mp_ioapics[idx].mpc_apicid = id;
+               tmpid = id;
+       if (tmpid == -1) {
+               nr_ioapics--;
+               return;
+       }
+       mp_ioapics[idx].mpc_apicid = tmpid;
        mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
        
        /*