crypto: qce - fix error return code in qce_skcipher_async_req_handle()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 1339a7c3 ("crypto: qce: skcipher: Fix incorrect sg count for dma transfers")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qce/skcipher.c

@@ -124,13 +124,17 @@ qce_skcipher_async_req_handle(struct crypto_async_request *async_req)
 	rctx->dst_sg = rctx->dst_tbl.sgl;
 
 	dst_nents = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
-	if (dst_nents < 0)
+	if (dst_nents < 0) {
+		ret = dst_nents;
 		goto error_free;
+	}
 
 	if (diff_dst) {
 		src_nents = dma_map_sg(qce->dev, req->src, rctx->src_nents, dir_src);
-		if (src_nents < 0)
+		if (src_nents < 0) {
+			ret = src_nents;
 			goto error_unmap_dst;
+		}
 		rctx->src_sg = req->src;
 	} else {
 		rctx->src_sg = rctx->dst_sg;