The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 4c35b7a51e2f291471f7221d112c6a45c63e83bc Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Nuno=20S=C3=A1?= nuno.sa@analog.com Date: Mon, 28 Oct 2019 17:33:49 +0100 Subject: [PATCH] iio: adis16480: Add debugfs_reg_access entry MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

The driver is defining debugfs entries by calling `adis16480_debugfs_init()`. However, those entries are attached to the iio_dev debugfs entry which won't exist if no debugfs_reg_access callback is provided.

Fixes: 2f3abe6cbb6c ("iio:imu: Add support for the ADIS16480 and similar IMUs") Signed-off-by: Nuno Sá nuno.sa@analog.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com

diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c index f1d52563951c..078d49deebd4 100644 --- a/drivers/iio/imu/adis16480.c +++ b/drivers/iio/imu/adis16480.c @@ -923,6 +923,7 @@ static const struct iio_info adis16480_info = { .read_raw = &adis16480_read_raw, .write_raw = &adis16480_write_raw, .update_scan_mode = adis_update_scan_mode, + .debugfs_reg_access = adis_debugfs_reg_access, };

static int adis16480_stop_device(struct iio_dev *indio_dev)