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 <vicki.milhoan@xxxxxxxxxxxxx>
---
drivers/crypto/caam/caamhash.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index f2f1e87..6720332 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -843,17 +843,17 @@ 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 |
@@ -1276,9 +1276,10 @@ 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 |
--
2.1.4
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