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iio: mxs-lradc: fix buffer overflow

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Fixes:
drivers/staging/iio/adc/mxs-lradc.c:1556 mxs_lradc_probe() error: buffer
overflow 'iio->channels' 15 <= 15

The reported available scales for in_voltage15 were also wrong.

The realbits lookup is not necessary as all the channels of the LRADC have the
same resolution, use LRADC_RESOLUTION instead.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alexandre Belloni 2014-01-13 16:02:00 +00:00 committed by Jonathan Cameron
parent 71bd89454d
commit d4bf105bb6
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/iio/adc/mxs-lradc.c
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@ -1613,7 +1613,7 @@ static int mxs_lradc_probe(struct platform_device *pdev)
* of the array.
*/
scale_uv = ((u64)lradc->vref_mv[i] * 100000000) >>
(iio->channels[i].scan_type.realbits - s);
(LRADC_RESOLUTION - s);
lradc->scale_avail[i][s].nano =
do_div(scale_uv, 100000000) * 10;
lradc->scale_avail[i][s].integer = scale_uv;