crypto: mv_cesa - ensure backlog is initialised

backlog is not initialised so in the case where
cpg->eng_st != ENGINE_IDLE it is never initialised and
hence which could lead to an illegal memory dereference
in the statement:

  backlog->complete(backlog, -EINPROGRESS);

Discovered with cppcheck static analsys:
[drivers/crypto/mv_cesa.c:616]:
   (error) Uninitialized variable: backlog

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index f91f15ddee92..e63efbd840b5 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -595,7 +595,7 @@ static int queue_manag(void *data)
         cpg->eng_st = ENGINE_IDLE;
         do {
                 struct crypto_async_request *async_req = NULL;
-                struct crypto_async_request *backlog;
+                struct crypto_async_request *backlog = NULL;
 
                 __set_current_state(TASK_INTERRUPTIBLE);