iio: adc: at91: disable adc channel interrupt in timeout case

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commit 09c6bdee51 upstream.

Having a brief look at at91_adc_read_raw() it is obvious that in the case
of a timeout the setting of AT91_ADC_CHDR and AT91_ADC_IDR registers is
omitted. If 2 different channels are queried we can end up with a
situation where two interrupts are enabled, but only one interrupt is
cleared in the interrupt handler. Resulting in a interrupt loop and a
system hang.

Signed-off-by: Georg Ottinger <g.ottinger@abatec.at>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Georg Ottinger 2019-01-30 14:42:02 +01:00 • committed by Ben Hutchings

parent f7803d78f8

commit 82bbd92e6f

1 changed files with 17 additions and 11 deletions

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drivers/iio/adc/at91_adc.c

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