linux-kernel - [PATCH 2/3] iio: mxs-lradc: fix invalid channel number detection

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Message-Id: <1389628923-8689-3-git-send-email-alexandre.belloni@free-electrons.com>
Date:	Mon, 13 Jan 2014 17:02:02 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	Marek Vasut <marex@...x.de>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Subject: [PATCH 2/3] iio: mxs-lradc: fix invalid channel number detection

16 would be accepted as a channel number but it is invalid. It doesn't really
have any effect as mxs_lradc_read_raw is called from a "controlled" environment
so it it only gets values going from 0 to 15.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 drivers/staging/iio/adc/mxs-lradc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
index aa86849daeba..2289dc1bd928 100644
--- a/drivers/staging/iio/adc/mxs-lradc.c
+++ b/drivers/staging/iio/adc/mxs-lradc.c
@@ -898,7 +898,7 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev,
 	struct mxs_lradc *lradc = iio_priv(iio_dev);
 
 	/* Check for invalid channel */
-	if (chan->channel > LRADC_MAX_TOTAL_CHANS)
+	if (chan->channel >= LRADC_MAX_TOTAL_CHANS)
 		return -EINVAL;
 
 	switch (m) {
-- 
1.8.3.2

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