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authorOleksij Rempel <o.rempel@pengutronix.de>2017-07-12 06:40:28 +0200
committerLucas Stach <l.stach@pengutronix.de>2017-07-14 16:50:50 +0200
commit2a88dd64887ab851158003363195b89d9e7f5c00 (patch)
tree54301281972ddc010ef75bf1ca817f9fc88ad97e
parent59b57082ae61dca65e73dd433daabcdd0f40c094 (diff)
downloadbarebox-2a88dd64887ab851158003363195b89d9e7f5c00.tar.gz
crypto: caam: use dma_alloc_coherent instead of dma_alloc
dma_alloc return non-coherent memory, but the driver does no cache maintenance on the buffer, causing memory corruption. Fix this by requesting coherent memory for the DMA transfer. Fixes: ef4144b4ab63 (crypto: caam - fix RNG buffer cache alignment) Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
-rw-r--r--drivers/crypto/caam/caamrng.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index 31a9273..51c267e 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -203,8 +203,6 @@ static inline int rng_create_job_desc(struct caam_rng_ctx *ctx, int buf_id)
init_job_desc_shared(desc, ctx->sh_desc_dma, sh_len, HDR_SHARE_DEFER |
HDR_REVERSE);
- bd->addr = (dma_addr_t)bd->buf;
-
append_seq_out_ptr_intlen(desc, bd->addr, RN_BUF_SIZE, 0);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "rng job desc@: ", DUMP_PREFIX_OFFSET, 16, 4,
@@ -218,7 +216,7 @@ static int caam_init_buf(struct caam_rng_ctx *ctx, int buf_id)
struct buf_data *bd = &ctx->bufs[buf_id];
int err;
- bd->buf = dma_alloc(RN_BUF_SIZE);
+ bd->buf = dma_alloc_coherent(RN_BUF_SIZE, &bd->addr);
err = rng_create_job_desc(ctx, buf_id);
if (err)