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[PATCH] i386: Handle non existing APICs without panicing

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[description from AK]

This fixes booting in APIC mode on some ACER laptops. x86-64
did a similar change some time ago.

See http://bugzilla.kernel.org/show_bug.cgi?id=4700 for details

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andreas Deresch
2006-02-26 04:18:34 +01:00
committed by Linus Torvalds
parent 13a229abc2
commit 6070f9ec6b
2 changed files with 12 additions and 4 deletions
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6
arch/i386/kernel/io_apic.c
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@ -2566,8 +2566,10 @@ int __init io_apic_get_unique_id (int ioapic, int apic_id)
spin_unlock_irqrestore(&ioapic_lock, flags);
/* Sanity check */
if (reg_00.bits.ID != apic_id)
panic("IOAPIC[%d]: Unable change apic_id!\n", ioapic);
if (reg_00.bits.ID != apic_id) {
printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic);
return -1;
}
}
apic_printk(APIC_VERBOSE, KERN_INFO