From 16d4087fef605b53c187e6f059747c8c31b93df1 Mon Sep 17 00:00:00 2001 From: Victoria Milhoan Date: Mon, 15 Jun 2015 16:52:57 -0700 Subject: crypto: caam - Fix incorrect size when DMA unmapping buffer The CAAM driver uses two data buffers to store data for a hashing operation, with one buffer defined as active. This change forces switching of the active buffer when executing a hashing operation to avoid a later DMA unmap using the length of the opposite buffer. Signed-off-by: Victoria Milhoan Signed-off-by: Herbert Xu (cherry picked from commit 8af7b0f809a3d34657433ec545d64dff9808ce34) diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 27cefaa..8b22117 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -835,17 +835,17 @@ static int ahash_update_ctx(struct ahash_request *req) src_map_to_sec4_sg(jrdev, req->src, src_nents, edesc->sec4_sg + sec4_sg_src_index, chained); - if (*next_buflen) { + if (*next_buflen) scatterwalk_map_and_copy(next_buf, req->src, to_hash - *buflen, *next_buflen, 0); - state->current_buf = !state->current_buf; - } } else { (edesc->sec4_sg + sec4_sg_src_index - 1)->len |= SEC4_SG_LEN_FIN; } + state->current_buf = !state->current_buf; + sh_len = desc_len(sh_desc); desc = edesc->hw_desc; init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | @@ -1268,9 +1268,10 @@ static int ahash_update_no_ctx(struct ahash_request *req) scatterwalk_map_and_copy(next_buf, req->src, to_hash - *buflen, *next_buflen, 0); - state->current_buf = !state->current_buf; } + state->current_buf = !state->current_buf; + sh_len = desc_len(sh_desc); desc = edesc->hw_desc; init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | -- cgit v0.10.2