staging: iio: sca3000 fix bug due to scan_element directory move.

The device found passed to the attr functions is that of the ring
buffer, not the the iio_dev so we need to bounce through one more
hop to get the right address.

Reported-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index 8186d2b2cf4..c872fddfb2b 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -138,7 +138,8 @@ static ssize_t sca3000_show_ring_bpse(struct device *dev,
 {
         int len = 0, ret;
         u8 *rx;
-        struct iio_dev *indio_dev = dev_get_drvdata(dev);
+        struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+        struct iio_dev *indio_dev = ring->indio_dev;
         struct sca3000_state *st = indio_dev->dev_data;
 
         mutex_lock(&st->lock);
@@ -168,7 +169,8 @@ static ssize_t sca3000_store_ring_bpse(struct device *dev,
                                       const char *buf,
                                       size_t len)
 {
-        struct iio_dev *indio_dev = dev_get_drvdata(dev);
+        struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+        struct iio_dev *indio_dev = ring->indio_dev;
         struct sca3000_state *st = indio_dev->dev_data;
         int ret;
         u8 *rx;