crypto: sun8i-ss - test error before assigning

The first thing we should do after dma_map_single() is to test the
result.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index eaa0bba..49e2e94 100644 (file)
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -420,15 +420,15 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
        }
 
        addr_pad = dma_map_single(ss->dev, pad, j * 4, DMA_TO_DEVICE);
-       rctx->t_src[i].addr = addr_pad;
-       rctx->t_src[i].len = j;
-       rctx->t_dst[i].addr = addr_res;
-       rctx->t_dst[i].len = digestsize / 4;
        if (dma_mapping_error(ss->dev, addr_pad)) {
                dev_err(ss->dev, "DMA error on padding SG\n");
                err = -EINVAL;
                goto theend;
        }
+       rctx->t_src[i].addr = addr_pad;
+       rctx->t_src[i].len = j;
+       rctx->t_dst[i].addr = addr_res;
+       rctx->t_dst[i].len = digestsize / 4;
 
        err = sun8i_ss_run_hash_task(ss, rctx, crypto_tfm_alg_name(areq->base.tfm));