linux-kernel - [PATCH 1/2] iio: trigger: hrtimer: Disable irqs before calling iio_trigger

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Message-ID: <20200727145900.4563-1-ceggers@arri.de>
Date:   Mon, 27 Jul 2020 16:58:59 +0200
From:   Christian Eggers <ceggers@...i.de>
To:     Jonathan Cameron <jic23@...nel.org>
CC:     Christian Eggers <ceggers@...i.de>, <stable@...r.kernel.org>,
        "Hartmut Knaack" <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        "Peter Meerwald-Stadler" <pmeerw@...erw.net>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] iio: trigger: hrtimer: Disable irqs before calling iio_trigger_poll()

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

Signed-off-by: Christian Eggers <ceggers@...i.de>
Cc: stable@...r.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

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