x86: ioapic: Call free_irte only if interrupt remapping enabled
commit9717967c4b704ce344c954afb5bb160aa9c01c34
authorYinghai Lu <yinghai@kernel.org>
Mon, 18 Oct 2010 20:47:48 +0000 (18 13:47 -0700)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 19 Oct 2010 07:25:33 +0000 (19 09:25 +0200)
tree9f0865f56d5cd85eb1b604cdd34e005a7b1f65fc
parent032fa36091a925f555158f4e80f8a09d951cdb10
x86: ioapic: Call free_irte only if interrupt remapping enabled

On a system that support intr-rempping when booting with "intremap=off"

[  177.895501] BUG: unable to handle kernel NULL pointer dereference at 00000000000000f8
[  177.913316] IP: [<ffffffff8145fc18>] free_irte+0x47/0xc0
...
[  178.173326] Call Trace:
[  178.173574]  [<ffffffff810515b4>] destroy_irq+0x3a/0x75
[  178.192934]  [<ffffffff81051834>] arch_teardown_msi_irq+0xe/0x10
[  178.193418]  [<ffffffff81458dc3>] arch_teardown_msi_irqs+0x56/0x7f
[  178.213021]  [<ffffffff81458e79>] free_msi_irqs+0x8d/0xeb

Call free_irte only when interrupt remapping is enabled.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4CBCB274.7010108@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/kernel/apic/io_apic.c