crypto: caam - fix addressing of struct member

buf_0 and buf_1 in caam_hash_state are not next to each other.
Accessing buf_1 is incorrect from &buf_0 with an offset of only
size_of(buf_0). The same issue is also with buflen_0 and buflen_1

Cc: <stable@vger.kernel.org> # 3.13+
Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 061f3fbd9c79..f347ab7eea95 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -1417,9 +1417,9 @@ static int ahash_update_first(struct ahash_request *req)
         struct device *jrdev = ctx->jrdev;
         gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
                        CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
-        u8 *next_buf = state->buf_0 + state->current_buf *
-                       CAAM_MAX_HASH_BLOCK_SIZE;
-        int *next_buflen = &state->buflen_0 + state->current_buf;
+        u8 *next_buf = state->current_buf ? state->buf_1 : state->buf_0;
+        int *next_buflen = state->current_buf ?
+                &state->buflen_1 : &state->buflen_0;
         int to_hash;
         u32 *sh_desc = ctx->sh_desc_update_first, *desc;
         dma_addr_t ptr = ctx->sh_desc_update_first_dma;