[PATCH 4.4 71/75] iio: imu: adis16400: release allocated memory on failure

[gregkh]

From: Greg Kroah-Hartman <gre...@linuxfoundation.org>

From: Navid Emamdoost <navid.emamdo...@gmail.com>

commit ab612b1daf415b62c58e130cb3d0f30b255a14d0 upstream.

In adis_update_scan_mode, if allocation for adis->buffer fails,
previously allocated adis->xfer needs to be released.

Signed-off-by: Navid Emamdoost <navid.emamdo...@gmail.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
Signed-off-by: Jonathan Cameron <jonathan.came...@huawei.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlow...@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/iio/imu/adis_buffer.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/iio/imu/adis_buffer.c
+++ b/drivers/iio/imu/adis_buffer.c
@@ -39,8 +39,11 @@ int adis_update_scan_mode(struct iio_dev
                return -ENOMEM;
 
        adis->buffer = kzalloc(indio_dev->scan_bytes * 2, GFP_KERNEL);
-       if (!adis->buffer)
+       if (!adis->buffer) {
+               kfree(adis->xfer);
+               adis->xfer = NULL;
                return -ENOMEM;
+       }
 
        rx = adis->buffer;
        tx = rx + scan_count;