[PATCH] crypto: mv_cesa - fix hashing of chunks > 1920 bytes

[Phil Sutter]

This was broken by commit 7759995c75ae0cbd4c861582908449f6b6208e7a (yes,
myself). The basic problem here is since the digest state is only saved
after the last chunk, the state array is only valid when handling the
first chunk of the next buffer. Broken since linux-3.0.

Signed-off-by: Phil Sutter <phil.sut...@viprinet.com>
---
 drivers/crypto/mv_cesa.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 5c6f56f..dcd8bab 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -343,11 +343,13 @@ static void mv_process_hash_current(int first_block)
                else
                        op.config |= CFG_MID_FRAG;
 
-               writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A);
-               writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B);
-               writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C);
-               writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D);
-               writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E);
+               if (first_block) {
+                       writel(req_ctx->state[0], cpg->reg + 
DIGEST_INITIAL_VAL_A);
+                       writel(req_ctx->state[1], cpg->reg + 
DIGEST_INITIAL_VAL_B);
+                       writel(req_ctx->state[2], cpg->reg + 
DIGEST_INITIAL_VAL_C);
+                       writel(req_ctx->state[3], cpg->reg + 
DIGEST_INITIAL_VAL_D);
+                       writel(req_ctx->state[4], cpg->reg + 
DIGEST_INITIAL_VAL_E);
+               }
        }
 
        memcpy(cpg->sram + SRAM_CONFIG, &op, sizeof(struct sec_accel_config));
-- 
1.7.6.1


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