patch "iio: magnetometer: ak8975: Fix the error handling in" added to char-misc-linus

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

iio: magnetometer: ak8975: Fix the error handling in

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 3a26787dacf04257a68b16315c984eb2c340bc5e Mon Sep 17 00:00:00 2001
From: Zheyu Ma <[email protected]>
Date: Sat, 9 Apr 2022 11:48:49 +0800
Subject: iio: magnetometer: ak8975: Fix the error handling in
ak8975_power_on()

When the driver fails to enable the regulator 'vid', we will get the following splat:

[   79.955610] WARNING: CPU: 5 PID: 441 at drivers/regulator/core.c:2257 _regulator_put+0x3ec/0x4e0
[   79.959641] RIP: 0010:_regulator_put+0x3ec/0x4e0
[   79.967570] Call Trace:
[   79.967773]  <TASK>
[   79.967951]  regulator_put+0x1f/0x30
[   79.968254]  devres_release_group+0x319/0x3d0
[   79.968608]  i2c_device_probe+0x766/0x940

Fix this by disabling the 'vdd' regulator when failing to enable 'vid' regulator.

---
 drivers/iio/magnetometer/ak8975.c | 1 +
 1 file changed, 1 insertion(+)

index 088f748b683e..2432e697150c 100644
@@ -416,6 +416,7 @@ static int ak8975_power_on(const struct ak8975_data *data)
 	if (ret) {
 		dev_warn(&data->client->dev,
 			 "Failed to enable specified Vid supply\n");
+		regulator_disable(data->vdd);
 		return ret;
 	}
 

2.36.0