crypto: inside-secure - unmap the result in the hash send error path

This patch adds a label to unmap the result buffer in the hash send
function error path.

Fixes: 1b44c5a6 ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
Suggested-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/inside-secure/safexcel_hash.c

@@ -303,7 +303,7 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
 				   req->state_sz);
 	if (IS_ERR(rdesc)) {
 		ret = PTR_ERR(rdesc);
-		goto cdesc_rollback;
+		goto unmap_result;
 	}
 
 	spin_unlock_bh(&priv->ring[ring].egress_lock);
@@ -315,6 +315,8 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
 	*results = 1;
 	return 0;
 
+unmap_result:
+	dma_unmap_sg(priv->dev, areq->src, req->nents, DMA_TO_DEVICE);
 cdesc_rollback:
 	for (i = 0; i < n_cdesc; i++)
 		safexcel_ring_rollback_wptr(priv, &priv->ring[ring].cdr);