linux-kernel - [patch] mfd: off by one issue

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Message-ID: <20100328112808.GO5069@bicker>
Date:	Sun, 28 Mar 2010 14:28:08 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	Paul Fertser <fercerpav@...il.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Arnaud Patard <arnaud.patard@...-net.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] mfd: off by one issue

"pcf->irq_handler" has PCF50633_NUM_IRQ elements.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 03dcc92..4f13608 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -217,7 +217,7 @@ static struct attribute_group pcf_attr_group = {
 int pcf50633_register_irq(struct pcf50633 *pcf, int irq,
 			void (*handler) (int, void *), void *data)
 {
-	if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler)
+	if (irq < 0 || irq >= PCF50633_NUM_IRQ || !handler)
 		return -EINVAL;
 
 	if (WARN_ON(pcf->irq_handler[irq].handler))
@@ -234,7 +234,7 @@ EXPORT_SYMBOL_GPL(pcf50633_register_irq);
 
 int pcf50633_free_irq(struct pcf50633 *pcf, int irq)
 {
-	if (irq < 0 || irq > PCF50633_NUM_IRQ)
+	if (irq < 0 || irq >= PCF50633_NUM_IRQ)
 		return -EINVAL;
 
 	mutex_lock(&pcf->lock);
--
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