linux-kernel - [PATCH 4.1 057/267] iio: tmp006: Check channel info on write

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Message-Id: <20150731194003.719142379@linuxfoundation.org>
Date:	Fri, 31 Jul 2015 12:38:28 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Peter Meerwald <pmeerw@...erw.net>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH 4.1 057/267] iio: tmp006: Check channel info on write

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

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

From: Peter Meerwald <pmeerw@...erw.net>

commit 8d05abfaeff52bdf66aba3a3a337dcdbdb4911bf upstream.

only SAMP_FREQ is writable

Will lead to SAMP_FREQ being written by any attempt to write
to the other exported attributes and hence a rather unexpected
result!

Signed-off-by: Peter Meerwald <pmeerw@...erw.net>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iio/temperature/tmp006.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/iio/temperature/tmp006.c
+++ b/drivers/iio/temperature/tmp006.c
@@ -132,6 +132,9 @@ static int tmp006_write_raw(struct iio_d
 	struct tmp006_data *data = iio_priv(indio_dev);
 	int i;
 
+	if (mask != IIO_CHAN_INFO_SAMP_FREQ)
+		return -EINVAL;
+
 	for (i = 0; i < ARRAY_SIZE(tmp006_freqs); i++)
 		if ((val == tmp006_freqs[i][0]) &&
 		    (val2 == tmp006_freqs[i][1])) {


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