[PATCH 2/2] crypto: caam: caamrng: map desc and buffer

[Rouven Czerwinski <r.czerwinski@pengutronix.de>]

With DMA API debugging Barebox complains that some buffers are never
mapped before a sync. Add the map and unmap function calls.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
---
 drivers/crypto/caam/caamrng.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index ea154913ca..1b5713f978 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -91,6 +91,7 @@ static void rng_done(struct device *jrdev, u32 *desc, u32 err, void *context)
 
 	/* Buffer refilled, invalidate cache */
 	dma_sync_single_for_cpu(jrdev, bd->addr, RN_BUF_SIZE, DMA_FROM_DEVICE);
+	dma_unmap_single(jrdev, (unsigned long)desc, desc_bytes(desc), DMA_TO_DEVICE);
 }
 
 static inline int submit_job(struct caam_rng_ctx *ctx, int to_current)
@@ -102,6 +103,7 @@ static inline int submit_job(struct caam_rng_ctx *ctx, int to_current)
 
 	dev_dbg(jrdev, "submitting job %d\n", !(to_current ^ ctx->current_buf));
 
+	dma_map_single(jrdev, (void *)desc, desc_bytes(desc), DMA_TO_DEVICE);
 	dma_sync_single_for_device(jrdev, (unsigned long)desc, desc_bytes(desc),
 				   DMA_TO_DEVICE);
 
@@ -180,6 +182,7 @@ static inline int rng_create_sh_desc(struct caam_rng_ctx *ctx)
 
 	ctx->sh_desc_dma = (dma_addr_t)desc;
 
+	dma_map_single(ctx->jrdev, desc, desc_bytes(desc), DMA_TO_DEVICE);
 	dma_sync_single_for_device(ctx->jrdev, (unsigned long)desc, desc_bytes(desc),
 				   DMA_TO_DEVICE);
 
@@ -210,6 +213,7 @@ static int caam_init_buf(struct caam_rng_ctx *ctx, int buf_id)
 	int err;
 
 	bd->buf = dma_alloc_coherent(RN_BUF_SIZE, &bd->addr);
+	dma_map_single(ctx->jrdev, (void *)bd->addr, RN_BUF_SIZE, DMA_FROM_DEVICE);
 
 	err = rng_create_job_desc(ctx, buf_id);
 	if (err)
-- 
2.39.2