iio: adc: at91-sama5d2_adc: fix DMA conversion crash

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After the move of the postenable code to preenable, the DMA start was
done before the DMA init, which is not correct.
The DMA is initialized in set_watermark. Because of this, we need to call
the DMA start functions in set_watermark, after the DMA init, instead of
preenable hook, when the DMA is not properly setup yet.

Fixes: f3c034f617 ("iio: at91-sama5d2_adc: adjust iio_triggered_buffer_{predisable,postenable} positions")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20200923121748.49384-1-eugen.hristev@microchip.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Eugen Hristev 2020-09-23 15:17:48 +03:00 • committed by Jonathan Cameron

parent b8a533f3c2

commit 1a19879445

1 changed files with 12 additions and 4 deletions

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drivers/iio/adc/at91-sama5d2_adc.c

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