This is a note to let you know that I've just added the patch titled iio: magn: bmc150: Balance runtime pm + use pm_runtime_resume_and_get() to the 5.13-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-magn-bmc150-balance-runtime-pm-use-pm_runtime_re.patch and it can be found in the queue-5.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 5593e9e67a73f4821032cd5e5d29228a254d1197 Author: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Date: Sun May 9 12:33:37 2021 +0100 iio: magn: bmc150: Balance runtime pm + use pm_runtime_resume_and_get() [ Upstream commit 264da512431495e542fcaf56ffe75e7df0e7db74 ] probe() error paths after runtime pm is enabled, should disable it. remove() should not call pm_runtime_put_noidle() as there is no matching get() to have raised the reference count. This case has no affect a the runtime pm core protects against going negative. Whilst here use pm_runtime_resume_and_get() to tidy things up a little. coccicheck script didn't get this one due to complex code structure so found by inspection. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx> Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210509113354.660190-12-jic23@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iio/magnetometer/bmc150_magn.c b/drivers/iio/magnetometer/bmc150_magn.c index d534f4f3909e..6cf3eceaf2d9 100644 --- a/drivers/iio/magnetometer/bmc150_magn.c +++ b/drivers/iio/magnetometer/bmc150_magn.c @@ -265,7 +265,7 @@ static int bmc150_magn_set_power_state(struct bmc150_magn_data *data, bool on) int ret; if (on) { - ret = pm_runtime_get_sync(data->dev); + ret = pm_runtime_resume_and_get(data->dev); } else { pm_runtime_mark_last_busy(data->dev); ret = pm_runtime_put_autosuspend(data->dev); @@ -274,9 +274,6 @@ static int bmc150_magn_set_power_state(struct bmc150_magn_data *data, bool on) if (ret < 0) { dev_err(data->dev, "failed to change power state to %d\n", on); - if (on) - pm_runtime_put_noidle(data->dev); - return ret; } #endif @@ -966,12 +963,14 @@ int bmc150_magn_probe(struct device *dev, struct regmap *regmap, ret = iio_device_register(indio_dev); if (ret < 0) { dev_err(dev, "unable to register iio device\n"); - goto err_buffer_cleanup; + goto err_disable_runtime_pm; } dev_dbg(dev, "Registered device %s\n", name); return 0; +err_disable_runtime_pm: + pm_runtime_disable(dev); err_buffer_cleanup: iio_triggered_buffer_cleanup(indio_dev); err_free_irq: @@ -995,7 +994,6 @@ int bmc150_magn_remove(struct device *dev) pm_runtime_disable(dev); pm_runtime_set_suspended(dev); - pm_runtime_put_noidle(dev); iio_triggered_buffer_cleanup(indio_dev);