Patch "iio: proximity: as3935: fix iio_trigger_poll issue" has been added to the 4.11-stable tree

Patch "iio: proximity: as3935: fix iio_trigger_poll issue" has been added to the 4.11-stable tree

[gregkh]

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 4.11-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-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9122b54f266ddee09654fe3fbc503c1a60f4a01c Mon Sep 17 00:00:00 2001
From: Matt Ranostay <matt.ranostay@konsulko.com>
Date: Thu, 4 May 2017 17:32:19 -0700
Subject: iio: proximity: as3935: fix iio_trigger_poll issue

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");


Patches currently in stable-queue which might be from matt.ranostay@konsulko.com are

queue-4.11/iio-proximity-as3935-fix-as3935_int-mask.patch
queue-4.11/iio-proximity-as3935-fix-iio_trigger_poll-issue.patch