| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.11 086/150] iio: proximity: as3935: fix iio_trigger_poll issue | Date | Mon, 12 Jun 2017 17:24:53 +0200 |
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4.11-stable review patch. If anyone has any objections, please let me know.
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From: Matt Ranostay <matt.ranostay@konsulko.com>
commit 9122b54f266ddee09654fe3fbc503c1a60f4a01c upstream.
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: 24ddb0e4bba4 ("iio: Add AS3935 lightning sensor support") Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/iio/proximity/as3935.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -215,7 +215,7 @@ static irqreturn_t as3935_trigger_handle 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 wor 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");
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