Staging: iio: release locks on error paths

There are a couple places here where we should have called
mutex_unlock() before returning.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/accel/adis16201_core.c b/drivers/staging/iio/accel/adis16201_core.c
index cbc59c5..2fd01ae 100644 (file)
--- a/drivers/staging/iio/accel/adis16201_core.c
+++ b/drivers/staging/iio/accel/adis16201_core.c
@@ -305,13 +305,17 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
                mutex_lock(&indio_dev->mlock);
                addr = adis16201_addresses[chan->address][0];
                ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16);
-               if (ret)
+               if (ret) {
+                       mutex_unlock(&indio_dev->mlock);
                        return ret;
+               }
 
                if (val16 & ADIS16201_ERROR_ACTIVE) {
                        ret = adis16201_check_status(indio_dev);
-                       if (ret)
+                       if (ret) {
+                               mutex_unlock(&indio_dev->mlock);
                                return ret;
+                       }
                }
                val16 = val16 & ((1 << chan->scan_type.realbits) - 1);
                if (chan->scan_type.sign == 's')