diff options
Diffstat (limited to 'drivers/crypto/picoxcell_crypto.c')
| -rw-r--r-- | drivers/crypto/picoxcell_crypto.c | 56 |
1 files changed, 38 insertions, 18 deletions
diff --git a/drivers/crypto/picoxcell_crypto.c b/drivers/crypto/picoxcell_crypto.c index 615da961c4d8..3b1c7ecf078f 100644 --- a/drivers/crypto/picoxcell_crypto.c +++ b/drivers/crypto/picoxcell_crypto.c @@ -272,12 +272,6 @@ static unsigned spacc_load_ctx(struct spacc_generic_ctx *ctx, return indx; } -/* Count the number of scatterlist entries in a scatterlist. */ -static inline int sg_count(struct scatterlist *sg_list, int nbytes) -{ - return sg_nents_for_len(sg_list, nbytes); -} - static inline void ddt_set(struct spacc_ddt *ddt, dma_addr_t phys, size_t len) { ddt->p = phys; @@ -295,12 +289,17 @@ static struct spacc_ddt *spacc_sg_to_ddt(struct spacc_engine *engine, enum dma_data_direction dir, dma_addr_t *ddt_phys) { - unsigned nents, mapped_ents; + unsigned mapped_ents; struct scatterlist *cur; struct spacc_ddt *ddt; int i; + int nents; - nents = sg_count(payload, nbytes); + nents = sg_nents_for_len(payload, nbytes); + if (nents < 0) { + dev_err(engine->dev, "Invalid numbers of SG.\n"); + return NULL; + } mapped_ents = dma_map_sg(engine->dev, payload, nents, dir); if (mapped_ents + 1 > MAX_DDT_LEN) @@ -328,7 +327,7 @@ static int spacc_aead_make_ddts(struct aead_request *areq) struct spacc_engine *engine = req->engine; struct spacc_ddt *src_ddt, *dst_ddt; unsigned total; - unsigned int src_nents, dst_nents; + int src_nents, dst_nents; struct scatterlist *cur; int i, dst_ents, src_ents; @@ -336,13 +335,21 @@ static int spacc_aead_make_ddts(struct aead_request *areq) if (req->is_encrypt) total += crypto_aead_authsize(aead); - src_nents = sg_count(areq->src, total); + src_nents = sg_nents_for_len(areq->src, total); + if (src_nents < 0) { + dev_err(engine->dev, "Invalid numbers of src SG.\n"); + return src_nents; + } if (src_nents + 1 > MAX_DDT_LEN) return -E2BIG; dst_nents = 0; if (areq->src != areq->dst) { - dst_nents = sg_count(areq->dst, total); + dst_nents = sg_nents_for_len(areq->dst, total); + if (dst_nents < 0) { + dev_err(engine->dev, "Invalid numbers of dst SG.\n"); + return dst_nents; + } if (src_nents + 1 > MAX_DDT_LEN) return -E2BIG; } @@ -422,13 +429,22 @@ static void spacc_aead_free_ddts(struct spacc_req *req) (req->is_encrypt ? crypto_aead_authsize(aead) : 0); struct spacc_aead_ctx *aead_ctx = crypto_aead_ctx(aead); struct spacc_engine *engine = aead_ctx->generic.engine; - unsigned nents = sg_count(areq->src, total); + int nents = sg_nents_for_len(areq->src, total); + + /* sg_nents_for_len should not fail since it works when mapping sg */ + if (unlikely(nents < 0)) { + dev_err(engine->dev, "Invalid numbers of src SG.\n"); + return; + } if (areq->src != areq->dst) { dma_unmap_sg(engine->dev, areq->src, nents, DMA_TO_DEVICE); - dma_unmap_sg(engine->dev, areq->dst, - sg_count(areq->dst, total), - DMA_FROM_DEVICE); + nents = sg_nents_for_len(areq->dst, total); + if (unlikely(nents < 0)) { + dev_err(engine->dev, "Invalid numbers of dst SG.\n"); + return; + } + dma_unmap_sg(engine->dev, areq->dst, nents, DMA_FROM_DEVICE); } else dma_unmap_sg(engine->dev, areq->src, nents, DMA_BIDIRECTIONAL); @@ -440,7 +456,12 @@ static void spacc_free_ddt(struct spacc_req *req, struct spacc_ddt *ddt, dma_addr_t ddt_addr, struct scatterlist *payload, unsigned nbytes, enum dma_data_direction dir) { - unsigned nents = sg_count(payload, nbytes); + int nents = sg_nents_for_len(payload, nbytes); + + if (nents < 0) { + dev_err(req->engine->dev, "Invalid numbers of SG.\n"); + return; + } dma_unmap_sg(req->engine->dev, payload, nents, dir); dma_pool_free(req->engine->req_pool, ddt, ddt_addr); @@ -835,8 +856,7 @@ static int spacc_ablk_need_fallback(struct spacc_req *req) static void spacc_ablk_complete(struct spacc_req *req) { - struct ablkcipher_request *ablk_req = - container_of(req->req, struct ablkcipher_request, base); + struct ablkcipher_request *ablk_req = ablkcipher_request_cast(req->req); if (ablk_req->src != ablk_req->dst) { spacc_free_ddt(req, req->src_ddt, req->src_addr, ablk_req->src, |