linux-kernel - [ 76/89] Dove: Fix irq_to

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Date:	Mon, 03 Dec 2012 14:33:02 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>
Subject: [ 76/89] Dove: Fix irq_to_pmu()

3.2-stable review patch.  If anyone has any objections, please let me know.

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

From: Russell King - ARM Linux <linux@....linux.org.uk>

commit d356cf5a74afa32b40decca3c9dd88bc3cd63eb5 upstream.

PMU interrupts start at IRQ_DOVE_PMU_START, not IRQ_DOVE_PMU_START + 1.
Fix the condition.  (It may have been less likely to occur had the code
been written "if (irq >= IRQ_DOVE_PMU_START" which imho is the easier
to understand notation, and matches the normal way of thinking about
these things.)

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
Signed-off-by: Jason Cooper <jason@...edaemon.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/arm/mach-dove/include/mach/pm.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-dove/include/mach/pm.h b/arch/arm/mach-dove/include/mach/pm.h
index 7bcd0df..b47f750 100644
--- a/arch/arm/mach-dove/include/mach/pm.h
+++ b/arch/arm/mach-dove/include/mach/pm.h
@@ -63,7 +63,7 @@ static inline int pmu_to_irq(int pin)
 
 static inline int irq_to_pmu(int irq)
 {
-	if (IRQ_DOVE_PMU_START < irq && irq < NR_IRQS)
+	if (IRQ_DOVE_PMU_START <= irq && irq < NR_IRQS)
 		return irq - IRQ_DOVE_PMU_START;
 
 	return -EINVAL;


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