[PATCH] crypto/fsl: fsl_hash: Fix crash in flush dcache

[Gaurav Jain]

wrong end address passed to flush_dcache_range.
modified the flush_dache logic for scatter list elements.

Fixes: 1919f58a8f (crypto/fsl: fsl_hash: Fix dcache issue in caam_hash_finish)
Signed-off-by: Gaurav Jain <gaurav.j...@nxp.com>
---
 drivers/crypto/fsl/fsl_hash.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/fsl/fsl_hash.c b/drivers/crypto/fsl/fsl_hash.c
index 9e6829b7ad..404e3d1b78 100644
--- a/drivers/crypto/fsl/fsl_hash.c
+++ b/drivers/crypto/fsl/fsl_hash.c
@@ -131,25 +131,31 @@ static int caam_hash_update(void *hash_ctx, const void 
*buf,
 static int caam_hash_finish(void *hash_ctx, void *dest_buf,
                            int size, enum caam_hash_algos caam_algo)
 {
-       uint32_t len = 0;
+       uint32_t len = 0, sg_entry_len;
        struct sha_ctx *ctx = hash_ctx;
        int i = 0, ret = 0;
+       ulong addr;
 
        if (size < driver_hash[caam_algo].digestsize) {
                return -EINVAL;
        }
 
-       for (i = 0; i < ctx->sg_num; i++)
-               len += (sec_in32(&ctx->sg_tbl[i].len_flag) &
-                       SG_ENTRY_LENGTH_MASK);
-
+       flush_dcache_range((ulong)ctx->sg_tbl,
+                          (ulong)(ctx->sg_tbl) + (ctx->sg_num * sizeof(struct 
sg_entry)));
+       for (i = 0; i < ctx->sg_num; i++) {
+               sg_entry_len = (sec_in32(&ctx->sg_tbl[i].len_flag) &
+                               SG_ENTRY_LENGTH_MASK);
+               len += sg_entry_len;
+               addr = ctx->sg_tbl[i].addr_hi;
+               addr = (addr << 32) | ctx->sg_tbl[i].addr_lo;
+               flush_dcache_range((ulong)addr, (ulong)addr + sg_entry_len);
+       }
        inline_cnstr_jobdesc_hash(ctx->sha_desc, (uint8_t *)ctx->sg_tbl, len,
                                  ctx->hash,
                                  driver_hash[caam_algo].alg_type,
                                  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,
-- 
2.25.1