This patch fixes passing of a potential null pointer.

Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Christian Gromm <christian.gr...@microchip.com>
---
 drivers/staging/most/aim-cdev/cdev.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/most/aim-cdev/cdev.c 
b/drivers/staging/most/aim-cdev/cdev.c
index cfc32df..252a17c 100644
--- a/drivers/staging/most/aim-cdev/cdev.c
+++ b/drivers/staging/most/aim-cdev/cdev.c
@@ -204,7 +204,8 @@ static ssize_t aim_write(struct file *filp, const char 
__user *buf,
        }
        return actual_len - retval;
 error:
-       most_put_mbo(mbo);
+       if (mbo)
+               most_put_mbo(mbo);
        return err;
 }
 
-- 
1.7.9.5

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