[PATCH] tile: fix panic with large IRQ number

* [PATCH] tile: fix panic with large IRQ number
@ 2013-08-09 19:41 Chris Metcalf
  0 siblings, 0 replies; only message in thread
From: Chris Metcalf @ 2013-08-09 19:41 UTC (permalink / raw)
  To: linux-kernel

The "available_irqs" value needs to actually reflect the IRQs
available, not just start as an all-ones mask, since we only
have 32 IRQs available even on a 64-bit platform.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---
 arch/tile/kernel/irq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/tile/kernel/irq.c b/arch/tile/kernel/irq.c
index c90de6c..0e6c521 100644
--- a/arch/tile/kernel/irq.c
+++ b/arch/tile/kernel/irq.c
@@ -55,7 +55,8 @@ static DEFINE_PER_CPU(int, irq_depth);
 
 /* State for allocating IRQs on Gx. */
 #if CHIP_HAS_IPI()
-static unsigned long available_irqs = ~(1UL << IRQ_RESCHEDULE);
+static unsigned long available_irqs = ((1UL << NR_IRQS) - 1) &
+				      (~(1UL << IRQ_RESCHEDULE));
 static DEFINE_SPINLOCK(available_irqs_lock);
 #endif
 
-- 
1.8.3.1


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