patch "iio:chemical:ccs811: rearrange iio trigger get and register" added to char-misc-linus

This is a note to let you know that I've just added the patch titled

iio:chemical:ccs811: rearrange iio trigger get and register

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From d710359c0b445e8c03e24f19ae2fb79ce7282260 Mon Sep 17 00:00:00 2001
From: Dmitry Rokosov <[email protected]>
Date: Tue, 24 May 2022 18:14:45 +0000
Subject: iio:chemical:ccs811: rearrange iio trigger get and register

IIO trigger interface function iio_trigger_get() should be called after iio_trigger_register() (or its devm analogue) strictly, because of iio_trigger_get() acquires module refcnt based on the trigger->owner pointer, which is initialized inside iio_trigger_register() to THIS_MODULE.
If this call order is wrong, the next iio_trigger_put() (from sysfs callback or "delete module" path) will dereference "default" module refcnt, which is incorrect behaviour.

---
 drivers/iio/chemical/ccs811.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 847194fa1e46..80ef1aa9aae3 100644
@@ -499,11 +499,11 @@ static int ccs811_probe(struct i2c_client *client,
 
 		data->drdy_trig->ops = &ccs811_trigger_ops;
 		iio_trigger_set_drvdata(data->drdy_trig, indio_dev);
-		indio_dev->trig = data->drdy_trig;
-		iio_trigger_get(indio_dev->trig);
 		ret = iio_trigger_register(data->drdy_trig);
 		if (ret)
 			goto err_poweroff;
+
+		indio_dev->trig = iio_trigger_get(data->drdy_trig);
 	}
 
 	ret = iio_triggered_buffer_setup(indio_dev, NULL,

2.36.1