[PATCH 4.4 72/75] iio: imu: adis16400: fix memory leak

[gregkh]

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

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

commit 9c0530e898f384c5d279bfcebd8bb17af1105873 upstream.

In adis_update_scan_mode_burst, if adis->buffer allocation fails release
the adis->xfer.

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>
[krzk: backport applied to adis16400_buffer.c instead of adis_buffer.c]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlow...@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/iio/imu/adis16400_buffer.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/iio/imu/adis16400_buffer.c
+++ b/drivers/iio/imu/adis16400_buffer.c
@@ -37,8 +37,11 @@ int adis16400_update_scan_mode(struct ii
                return -ENOMEM;
 
        adis->buffer = kzalloc(burst_length + sizeof(u16), GFP_KERNEL);
-       if (!adis->buffer)
+       if (!adis->buffer) {
+               kfree(adis->xfer);
+               adis->xfer = NULL;
                return -ENOMEM;
+       }
 
        tx = adis->buffer + burst_length;
        tx[0] = ADIS_READ_REG(ADIS16400_GLOB_CMD);