iio: adc: stm32-adc: fix possible division by zero in processed channel

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In case the conversion has failed or returned zero, processing *val
can lead to a division by zero. Need to check for errors, or converted
value is zero, before processing the data. In case the converted value
is zero, e.g. the Vrefint channel, this should be considered as invalid
in all cases.

Fixes: 0e346b2cfa ("iio: adc: stm32-adc: add vrefint calibration support")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260911161555.244F31F000FF@smtp.kernel.org/
Cc: stable@vger.kernel.org
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

...

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Fabrice Gasnier 2026-09-16 19:15:04 +02:00 • committed by Jonathan Cameron

parent 9db3deeb2d

commit c5de6a6f85

1 changed files with 7 additions and 2 deletions

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drivers/iio/adc/stm32-adc.c

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