linux-kernel - [PATCH] iio: trigger: sysfs: Disable irqs before calling iio_trigger

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Message-ID: <20200727145714.4377-1-ceggers@arri.de>
Date:   Mon, 27 Jul 2020 16:57:13 +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>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] iio: trigger: sysfs: 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-sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/trigger/iio-trig-sysfs.c b/drivers/iio/trigger/iio-trig-sysfs.c
index e09e58072872..66a96b1632f8 100644
--- a/drivers/iio/trigger/iio-trig-sysfs.c
+++ b/drivers/iio/trigger/iio-trig-sysfs.c
@@ -94,7 +94,9 @@ static void iio_sysfs_trigger_work(struct irq_work *work)
 	struct iio_sysfs_trig *trig = container_of(work, struct iio_sysfs_trig,
 							work);
 
+	local_irq_disable();
 	iio_trigger_poll(trig->trig);
+	local_irq_enable();
 }
 
 static ssize_t iio_sysfs_trigger_poll(struct device *dev,
-- 
Christian Eggers
Embedded software developer

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