crypto: talitos - fix hash result for VMAP_STACK

When VMAP_STACK is selected, stack cannot be DMA-mapped.
Therefore, the hash result has to be DMA-mapped in the request
context and copied into areq->result at completion.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 56e3068..bcd5336 100644 (file)
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1704,6 +1704,7 @@ static void common_nonsnoop_hash_unmap(struct device *dev,
                                       struct ahash_request *areq)
 {
        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
+       struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
        struct talitos_private *priv = dev_get_drvdata(dev);
        bool is_sec1 = has_ftr_sec1(priv);
        struct talitos_desc *desc = &edesc->desc;
@@ -1714,6 +1715,9 @@ static void common_nonsnoop_hash_unmap(struct device *dev,
        if (desc->next_desc &&
            desc->ptr[5].ptr != desc2->ptr[5].ptr)
                unmap_single_talitos_ptr(dev, &desc2->ptr[5], DMA_FROM_DEVICE);
+       if (req_ctx->last)
+               memcpy(areq->result, req_ctx->hw_context,
+                      crypto_ahash_digestsize(tfm));
 
        if (req_ctx->psrc)
                talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL, 0, 0);
@@ -1845,7 +1849,7 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc,
        if (req_ctx->last)
                map_single_talitos_ptr(dev, &desc->ptr[5],
                                       crypto_ahash_digestsize(tfm),
-                                      areq->result, DMA_FROM_DEVICE);
+                                      req_ctx->hw_context, DMA_FROM_DEVICE);
        else
                map_single_talitos_ptr_nosync(dev, &desc->ptr[5],
                                              req_ctx->hw_context_size,