From: Sean Nyekjaer <sean@geanix.com>
Date: Mon, 20 Oct 2025 13:09:00 +0000 (-0400)
Subject: iio: imu: inv_icm42600: Avoid configuring if already pm_runtime suspended
X-Git-Tag: v6.6.114~20
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a4970f5087e2d60e65eefff0d353a0629a3137ac;p=thirdparty%2Fkernel%2Fstable.git

iio: imu: inv_icm42600: Avoid configuring if already pm_runtime suspended

[ Upstream commit 466f7a2fef2a4e426f809f79845a1ec1aeb558f4 ]

Do as in suspend, skip resume configuration steps if the device is already
pm_runtime suspended. This avoids reconfiguring a device that is already
in the correct low-power state and ensures that pm_runtime handles the
power state transitions properly.

Fixes: 31c24c1e93c3 ("iio: imu: inv_icm42600: add core of new inv_icm42600 driver")
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Link: https://patch.msgid.link/20250901-icm42pmreg-v3-3-ef1336246960@geanix.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[ adjusted context due to missing APEX/WoM features in older kernel version ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
index a4c8bdba254c..99eb651743f8 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
@@ -687,17 +687,15 @@ EXPORT_SYMBOL_NS_GPL(inv_icm42600_core_probe, IIO_ICM42600);
 static int inv_icm42600_suspend(struct device *dev)
 {
 	struct inv_icm42600_state *st = dev_get_drvdata(dev);
-	int ret;
+	int ret = 0;
 
 	mutex_lock(&st->lock);
 
 	st->suspended.gyro = st->conf.gyro.mode;
 	st->suspended.accel = st->conf.accel.mode;
 	st->suspended.temp = st->conf.temp_en;
-	if (pm_runtime_suspended(dev)) {
-		ret = 0;
+	if (pm_runtime_suspended(dev))
 		goto out_unlock;
-	}
 
 	/* disable FIFO data streaming */
 	if (st->fifo.on) {
@@ -729,10 +727,13 @@ static int inv_icm42600_resume(struct device *dev)
 	struct inv_icm42600_state *st = dev_get_drvdata(dev);
 	struct inv_sensors_timestamp *gyro_ts = iio_priv(st->indio_gyro);
 	struct inv_sensors_timestamp *accel_ts = iio_priv(st->indio_accel);
-	int ret;
+	int ret = 0;
 
 	mutex_lock(&st->lock);
 
+	if (pm_runtime_suspended(dev))
+		goto out_unlock;
+
 	ret = inv_icm42600_enable_regulator_vddio(st);
 	if (ret)
 		goto out_unlock;