[PATCH] iio: accel: mma9553: disable autosuspend on remove

[Guangshuo Li]

mma9553_probe() enables runtime PM autosuspend with
pm_runtime_use_autosuspend(). The probe error path correctly undoes
this setting with pm_runtime_dont_use_autosuspend(), but the normal
remove path only disables runtime PM.

The runtime PM API requires pm_runtime_use_autosuspend() to be undone
with pm_runtime_dont_use_autosuspend() at driver exit unless runtime PM
was enabled with devm_pm_runtime_enable(). Leaving the autosuspend flag
set therefore leaves the runtime PM state incompletely cleaned up after
the driver is unbound.

Add the missing pm_runtime_dont_use_autosuspend() call to the remove
path.

This issue was found by manual code inspection.

Fixes: 40cb761306d6 ("iio: add driver for Freescale MMA9553")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
---
 drivers/iio/accel/mma9553.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
index 8e7aaac89d47..5a36d415a837 100644
--- a/drivers/iio/accel/mma9553.c
+++ b/drivers/iio/accel/mma9553.c
@@ -1136,6 +1136,7 @@ static void mma9553_remove(struct i2c_client *client)
 
 	iio_device_unregister(indio_dev);
 
+	pm_runtime_dont_use_autosuspend(&client->dev);
 	pm_runtime_disable(&client->dev);
 	pm_runtime_set_suspended(&client->dev);
 
-- 
2.43.0