From: Jonathan Cameron <jic23@kernel.org>
To: Christian Eggers <ceggers@arri.de>
Cc: <stable@vger.kernel.org>, "Hartmut Knaack" <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
"Peter Meerwald-Stadler" <pmeerw@pmeerw.net>,
<linux-iio@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iio: trigger: sysfs: Disable irqs before calling iio_trigger_poll()
Date: Sat, 1 Aug 2020 17:02:34 +0100 [thread overview]
Message-ID: <20200801170234.2953b087@archlinux> (raw)
In-Reply-To: <20200727145714.4377-1-ceggers@arri.de>
On Mon, 27 Jul 2020 16:57:13 +0200
Christian Eggers <ceggers@arri.de> wrote:
> iio_trigger_poll() calls generic_handle_irq(). This function expects to
> be run with local IRQs disabled.
Was there an error or warning that lead to this patch?
Or can you point to what call in generic_handle_irq is making the
assumption that we are breaking?
Given this is using the irq_work framework I'm wondering if this is
a more general problem?
Basically more info please!
Thanks,
Jonathan
>
> Signed-off-by: Christian Eggers <ceggers@arri.de>
> Cc: stable@vger.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,
next prev parent reply other threads:[~2020-08-01 16:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 14:57 [PATCH] iio: trigger: sysfs: Disable irqs before calling iio_trigger_poll() Christian Eggers
2020-08-01 16:02 ` Jonathan Cameron [this message]
2020-08-02 15:05 ` Lars-Peter Clausen
2020-08-03 5:16 ` Christian Eggers
2020-08-03 6:37 ` Lars-Peter Clausen
2020-08-03 6:44 ` Christian Eggers
2020-08-03 6:52 ` Lars-Peter Clausen
2020-08-12 11:01 ` Christian Eggers
2020-08-13 7:23 ` Lars-Peter Clausen
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