diff options
| -rw-r--r-- | drivers/crypto/caam/caamalg_qi2.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c index d19c97acf1aa..f3aac3efd51c 100644 --- a/drivers/crypto/caam/caamalg_qi2.c +++ b/drivers/crypto/caam/caamalg_qi2.c @@ -3795,10 +3795,13 @@ static int ahash_final_no_ctx(struct ahash_request *req) if (!edesc) return ret; - state->buf_dma = dma_map_single(ctx->dev, buf, buflen, DMA_TO_DEVICE); - if (dma_mapping_error(ctx->dev, state->buf_dma)) { - dev_err(ctx->dev, "unable to map src\n"); - goto unmap; + if (buflen) { + state->buf_dma = dma_map_single(ctx->dev, buf, buflen, + DMA_TO_DEVICE); + if (dma_mapping_error(ctx->dev, state->buf_dma)) { + dev_err(ctx->dev, "unable to map src\n"); + goto unmap; + } } edesc->dst_dma = dma_map_single(ctx->dev, req->result, digestsize, @@ -3811,9 +3814,17 @@ static int ahash_final_no_ctx(struct ahash_request *req) memset(&req_ctx->fd_flt, 0, sizeof(req_ctx->fd_flt)); dpaa2_fl_set_final(in_fle, true); - dpaa2_fl_set_format(in_fle, dpaa2_fl_single); - dpaa2_fl_set_addr(in_fle, state->buf_dma); - dpaa2_fl_set_len(in_fle, buflen); + /* + * crypto engine requires the input entry to be present when + * "frame list" FD is used. + * Since engine does not support FMT=2'b11 (unused entry type), leaving + * in_fle zeroized (except for "Final" flag) is the best option. + */ + if (buflen) { + dpaa2_fl_set_format(in_fle, dpaa2_fl_single); + dpaa2_fl_set_addr(in_fle, state->buf_dma); + dpaa2_fl_set_len(in_fle, buflen); + } dpaa2_fl_set_format(out_fle, dpaa2_fl_single); dpaa2_fl_set_addr(out_fle, edesc->dst_dma); dpaa2_fl_set_len(out_fle, digestsize); |