3.16.82-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Nuno Sá <nuno.sa@xxxxxxxxxx> commit 4c35b7a51e2f291471f7221d112c6a45c63e83bc upstream. 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@xxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- drivers/iio/imu/adis16480.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iio/imu/adis16480.c +++ b/drivers/iio/imu/adis16480.c @@ -760,6 +760,7 @@ static const struct iio_info adis16480_i .read_raw = &adis16480_read_raw, .write_raw = &adis16480_write_raw, .update_scan_mode = adis_update_scan_mode, + .debugfs_reg_access = adis_debugfs_reg_access, .driver_module = THIS_MODULE, };