This is a note to let you know that I've just added the patch titled
iio: adc: ad7091r: Pass iio_dev to event handler
to the 5.10-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-adc-ad7091r-pass-iio_dev-to-event-handler.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a25a7df518fc71b1ba981d691e9322e645d2689c Mon Sep 17 00:00:00 2001
From: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
Date: Sat, 16 Dec 2023 14:46:11 -0300
Subject: iio: adc: ad7091r: Pass iio_dev to event handler
From: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
commit a25a7df518fc71b1ba981d691e9322e645d2689c upstream.
Previous version of ad7091r event handler received the ADC state pointer
and retrieved the iio device from driver data field with dev_get_drvdata().
However, no driver data have ever been set, which led to null pointer
dereference when running the event handler.
Pass the iio device to the event handler and retrieve the ADC state struct
from it so we avoid the null pointer dereference and save the driver from
filling the driver data field.
Fixes: ca69300173b6 ("iio: adc: Add support for AD7091R5 ADC")
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
Link: https://lore.kernel.org/r/5024b764107463de9578d5b3b0a3d5678e307b1a.1702746240.git.marcelo.schmitt1@xxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/adc/ad7091r-base.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -174,8 +174,8 @@ static const struct iio_info ad7091r_inf
static irqreturn_t ad7091r_event_handler(int irq, void *private)
{
- struct ad7091r_state *st = (struct ad7091r_state *) private;
- struct iio_dev *iio_dev = dev_get_drvdata(st->dev);
+ struct iio_dev *iio_dev = private;
+ struct ad7091r_state *st = iio_priv(iio_dev);
unsigned int i, read_val;
int ret;
s64 timestamp = iio_get_time_ns(iio_dev);
@@ -234,7 +234,7 @@ int ad7091r_probe(struct device *dev, co
if (irq) {
ret = devm_request_threaded_irq(dev, irq, NULL,
ad7091r_event_handler,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, st);
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, iio_dev);
if (ret)
return ret;
}
Patches currently in stable-queue which might be from marcelo.schmitt@xxxxxxxxxx are
queue-5.10/iio-adc-ad7091r-enable-internal-vref-if-external-vref-is-not-supplied.patch
queue-5.10/iio-adc-ad7091r-pass-iio_dev-to-event-handler.patch
queue-5.10/iio-adc-ad7091r-allow-users-to-configure-device-events.patch
