This is a note to let you know that I've just added the patch titled
iio: proximity: as3935: fix iio_trigger_poll issue
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-proximity-as3935-fix-iio_trigger_poll-issue.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9122b54f266ddee09654fe3fbc503c1a60f4a01c Mon Sep 17 00:00:00 2001
From: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
Date: Thu, 4 May 2017 17:32:19 -0700
Subject: iio: proximity: as3935: fix iio_trigger_poll issue
From: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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");
Patches currently in stable-queue which might be from matt.ranostay@xxxxxxxxxxxx are
queue-4.9/iio-proximity-as3935-fix-as3935_int-mask.patch
queue-4.9/iio-proximity-as3935-fix-iio_trigger_poll-issue.patch