[Xen-devel] [PATCH] linux/evtchn: fix off-by-one error in the pirq range check here too

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

As usual, written and tested on 2.6.27.19 and made apply to the 2.6.18
tree without further testing.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- sle11-2009-03-04.orig/drivers/xen/core/evtchn.c     2009-03-04 
11:38:32.000000000 +0100
+++ sle11-2009-03-04/drivers/xen/core/evtchn.c  2009-03-04 11:38:50.000000000 
+0100
@@ -1160,7 +1160,7 @@ core_initcall(evtchn_register);
 
 void evtchn_register_pirq(int irq)
 {
-       BUG_ON(irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS);
+       BUG_ON(irq < PIRQ_BASE || irq - PIRQ_BASE >= NR_PIRQS);
        if (identity_mapped_irq(irq) || type_from_irq(irq) != IRQT_UNBOUND)
                return;
        irq_info[irq] = mk_irq_info(IRQT_PIRQ, irq, 0);




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