6.6-stable review patch. If anyone has any objections, please let me know.
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From: Sean Nyekjaer sean@geanix.com
[ 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 --- drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
--- 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_p 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 de 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;