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iio: Fix error handling for PM

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The pm_runtime_enable will increase power disable depth.
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable(). In the PM Runtime docs:
    Drivers in ->remove() callback should undo the runtime PM changes done
    in ->probe(). Usually this means calling pm_runtime_disable(),
    pm_runtime_dont_use_autosuspend() etc.
We should do this in error handling.

Fix this problem for the following drivers: bmc150, bmg160, kmx61,
kxcj-1013, mma9551, mma9553.

Fixes: 7d0ead5c3f ("iio: Reconcile operation order between iio_register/unregister and pm functions")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220106112309.16879-1-linmq006@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Miaoqian Lin
2022-01-06 11:23:09 +00:00
committed by Jonathan Cameron
parent 4165456fe6
commit 632fe0bb8c
7 changed files with 27 additions and 8 deletions
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5
drivers/iio/imu/kmx61.c
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@@ -1385,7 +1385,7 @@ static int kmx61_probe(struct i2c_client *client,
ret = iio_device_register(data->acc_indio_dev);
if (ret < 0) {
dev_err(&client->dev, "Failed to register acc iio device\n");
goto err_buffer_cleanup_mag;
goto err_pm_cleanup;
}
ret = iio_device_register(data->mag_indio_dev);
@@ -1398,6 +1398,9 @@ static int kmx61_probe(struct i2c_client *client,
err_iio_unregister_acc:
iio_device_unregister(data->acc_indio_dev);
err_pm_cleanup:
pm_runtime_dont_use_autosuspend(&client->dev);
pm_runtime_disable(&client->dev);
err_buffer_cleanup_mag:
if (client->irq > 0)
iio_triggered_buffer_cleanup(data->mag_indio_dev);