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drivers: adc: lmp90xxx: validate ADC sequence channels mask

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Validate the channels mask passed from adc_read().

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2020-03-26 12:52:48 +01:00 • committed by Kumar Gala
commit ee97ab2bd8
1 changed files with 6 additions and 0 deletions
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6
drivers/adc/adc_lmp90xxx.c
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@ -495,6 +495,12 @@ static int lmp90xxx_adc_start_read(struct device *dev,
return -ENOTSUP; return -ENOTSUP;
} }
if (!lmp90xxx_has_channel(dev, find_msb_set(sequence->channels) - 1)) {
LOG_ERR("unsupported channels in mask: 0x%08x",
sequence->channels);
return -ENOTSUP;
}
err = lmp90xxx_validate_buffer_size(sequence); err = lmp90xxx_validate_buffer_size(sequence);
if (err) { if (err) {
LOG_ERR("buffer size too small"); LOG_ERR("buffer size too small");