[PATCH] crypto/fsl: fsl_hash: Fix dcache issue in caam_hash_finish

[Gaurav Jain]

HW accelerated hash operations are giving incorrect hash output.
so add flush and invalidate for input/output hash buffers.

Fixes: 94e3c8c4fd (crypto/fsl - Add progressive hashing support using hardware acceleration.)
Signed-off-by: Gaurav Jain <gaurav.jain at nxp.com>
---
 drivers/crypto/fsl/fsl_hash.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/crypto/fsl/fsl_hash.c b/drivers/crypto/fsl/fsl_hash.c
index a52c4ac957..9e6829b7ad 100644
--- a/drivers/crypto/fsl/fsl_hash.c
+++ b/drivers/crypto/fsl/fsl_hash.c
@@ -149,12 +149,20 @@ static int caam_hash_finish(void *hash_ctx, void *dest_buf,
 				  driver_hash[caam_algo].digestsize,
 				  1);
 
+	flush_dcache_range((ulong)ctx->sg_tbl, (ulong)(ctx->sg_tbl) + len);
+	flush_dcache_range((ulong)ctx->sha_desc,
+			   (ulong)(ctx->sha_desc) + (sizeof(uint32_t) * MAX_CAAM_DESCSIZE));
+	flush_dcache_range((ulong)ctx->hash,
+			   (ulong)(ctx->hash) + driver_hash[caam_algo].digestsize);
+
 	ret = run_descriptor_jr(ctx->sha_desc);
 
 	if (ret) {
 		debug("Error %x\n", ret);
 		return ret;
 	} else {
+		invalidate_dcache_range((ulong)ctx->hash,
+					(ulong)(ctx->hash) + driver_hash[caam_algo].digestsize);
 		memcpy(dest_buf, ctx->hash, sizeof(ctx->hash));
 	}
 	free(ctx);
-- 
2.25.1