From 65055e2108847af5e577cc7ce6bde45ea136d29a Mon Sep 17 00:00:00 2001 From: Franck LENORMAND Date: Tue, 19 Feb 2019 16:56:55 +0200 Subject: [PATCH] crypto: caam - fix hash context DMA unmap size MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When driver started using state->caam_ctxt for storing both running hash and final hash, it was not updated to handle different DMA unmap lengths. Cc: # v4.19+ Fixes: c19650d6ea99 ("crypto: caam - fix DMA mapping of stack memory") Signed-off-by: Franck LENORMAND Signed-off-by: Horia Geantă Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamhash.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 3bba3cb..2c5aca59 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -114,6 +114,7 @@ struct caam_hash_ctx { struct caam_hash_state { dma_addr_t buf_dma; dma_addr_t ctx_dma; + int ctx_dma_len; u8 buf_0[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned; int buflen_0; u8 buf_1[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned; @@ -171,6 +172,7 @@ static inline int map_seq_out_ptr_ctx(u32 *desc, struct device *jrdev, struct caam_hash_state *state, int ctx_len) { + state->ctx_dma_len = ctx_len; state->ctx_dma = dma_map_single(jrdev, state->caam_ctx, ctx_len, DMA_FROM_DEVICE); if (dma_mapping_error(jrdev, state->ctx_dma)) { @@ -212,6 +214,7 @@ static inline int ctx_map_to_sec4_sg(struct device *jrdev, struct caam_hash_state *state, int ctx_len, struct sec4_sg_entry *sec4_sg, u32 flag) { + state->ctx_dma_len = ctx_len; state->ctx_dma = dma_map_single(jrdev, state->caam_ctx, ctx_len, flag); if (dma_mapping_error(jrdev, state->ctx_dma)) { dev_err(jrdev, "unable to map ctx\n"); @@ -594,12 +597,10 @@ static inline void ahash_unmap_ctx(struct device *dev, struct ahash_edesc *edesc, struct ahash_request *req, int dst_len, u32 flag) { - struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); - struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash); struct caam_hash_state *state = ahash_request_ctx(req); if (state->ctx_dma) { - dma_unmap_single(dev, state->ctx_dma, ctx->ctx_len, flag); + dma_unmap_single(dev, state->ctx_dma, state->ctx_dma_len, flag); state->ctx_dma = 0; } ahash_unmap(dev, edesc, req, dst_len); @@ -1580,6 +1581,7 @@ static int ahash_init(struct ahash_request *req) state->final = ahash_final_no_ctx; state->ctx_dma = 0; + state->ctx_dma_len = 0; state->current_buf = 0; state->buf_dma = 0; state->buflen_0 = 0; -- 2.7.4