lguest: fix irq vectors.

	do_IRQ: cannot handle IRQ -1 vector 0x20 cpu 0
	------------[ cut here ]------------
	kernel BUG at arch/x86/kernel/irq_32.c:219!

We're not ISA: we have a 1:1 mapping from vectors to irqs.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 4e22fa08d629..a5d8e1ace1cf 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -586,6 +586,9 @@ static void __init lguest_init_IRQ(void)
 
         for (i = 0; i < LGUEST_IRQS; i++) {
                 int vector = FIRST_EXTERNAL_VECTOR + i;
+                /* Some systems map "vectors" to interrupts weirdly.  Lguest has
+                 * a straightforward 1 to 1 mapping, so force that here. */
+                __get_cpu_var(vector_irq)[vector] = i;
                 if (vector != SYSCALL_VECTOR) {
                         set_intr_gate(vector, interrupt[vector]);
                         set_irq_chip_and_handler_name(i, &lguest_irq_controller,