[patch 28/46] m68k: Fix off-by-one in m68k_setup_user_interrupt()

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>

commit 27123cbc264de89ce6951b1b4c84c223eb0f1702 upstream.

commit 69961c375288bdab7604e0bb1c8d22999bb8a347 ("[PATCH] m68k/Atari:
Interrupt updates") added a BUG_ON() with an incorrect upper bound
comparison, which causes an early crash on VME boards, where IRQ_USER is
8, cnt is 192 and NR_IRQS is 200.

Reported-by: Stephen N Chivers <schivers@xxxxxxxxxx>
Tested-by: Kars de Jong <jongk@xxxxxxxxxxxxxx>
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/m68k/kernel/ints.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/m68k/kernel/ints.c
+++ b/arch/m68k/kernel/ints.c
@@ -133,7 +133,7 @@ void __init m68k_setup_user_interrupt(un
 {
 	int i;
 
-	BUG_ON(IRQ_USER + cnt >= NR_IRQS);
+	BUG_ON(IRQ_USER + cnt > NR_IRQS);
 	m68k_first_user_vec = vec;
 	for (i = 0; i < cnt; i++)
 		irq_controller[IRQ_USER + i] = &user_irq_controller;

-- 
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