[PATCH 1/2] iio: trigger: hrtimer: Disable irqs before calling iio_trigger_poll()

* [PATCH 1/2] iio: trigger: hrtimer: Disable irqs before calling iio_trigger_poll()
@ 2020-07-27 14:58 Christian Eggers
  2020-07-30 13:48 ` Sasha Levin
  0 siblings, 1 reply; 3+ messages in thread
From: Christian Eggers @ 2020-07-27 14:58 UTC (permalink / raw)
  To: Jonathan Cameron
  Cc: Christian Eggers, stable, Hartmut Knaack, Lars-Peter Clausen,
	Peter Meerwald-Stadler, Geert Uytterhoeven, Alexandru Ardelean,
	linux-iio, linux-kernel

iio_trigger_poll() calls generic_handle_irq(). This function expects to
be run with local IRQs disabled.

Signed-off-by: Christian Eggers <ceggers@arri.de>
Cc: stable@vger.kernel.org
---
 drivers/iio/trigger/iio-trig-hrtimer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/trigger/iio-trig-hrtimer.c b/drivers/iio/trigger/iio-trig-hrtimer.c
index f59bf8d58586..2fe8a5c1484e 100644
--- a/drivers/iio/trigger/iio-trig-hrtimer.c
+++ b/drivers/iio/trigger/iio-trig-hrtimer.c
@@ -89,7 +89,9 @@ static enum hrtimer_restart iio_hrtimer_trig_handler(struct hrtimer *timer)
 	info = container_of(timer, struct iio_hrtimer_info, timer);
 
 	hrtimer_forward_now(timer, info->period);
+	local_irq_disable();
 	iio_trigger_poll(info->swt.trigger);
+	local_irq_enable();
 
 	return HRTIMER_RESTART;
 }
-- 
Christian Eggers
Embedded software developer

Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
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