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iio: proximity: as3935: fix iio_trigger_poll issue 

Using iio_trigger_poll() can oops when multiple interrupts
happen before the first is handled.

Use iio_trigger_poll_chained() instead and use the timestamp
when processed, since it will be in theory be 2 ms max latency.

Fixes: 24ddb0e4bb ("iio: Add AS3935 lightning sensor support")
Cc: stable@vger.kernel.org
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay 2017-05-04 17:32:19 -07:00 committed by Jonathan Cameron
parent 275292d3a3
commit 9122b54f26
1 changed files with 2 additions and 2 deletions
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4
drivers/iio/proximity/as3935.c
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@ -215,7 +215,7 @@ static irqreturn_t as3935_trigger_handler(int irq, void *private)
st->buffer[0] = val & AS3935_DATA_MASK;
iio_push_to_buffers_with_timestamp(indio_dev, &st->buffer,
pf->timestamp);
iio_get_time_ns(indio_dev));
err_read:
iio_trigger_notify_done(indio_dev->trig);
@ -244,7 +244,7 @@ static void as3935_event_work(struct work_struct *work)
switch (val) {
case AS3935_EVENT_INT:
iio_trigger_poll(st->trig);
iio_trigger_poll_chained(st->trig);
break;
case AS3935_NOISE_INT:
dev_warn(&st->spi->dev, "noise level is too high\n");