crypto: mv_cesa - Support processing of data from previous requests

Support processing of data from previous requests (as in hashing
update/final requests).

Signed-off-by: Uri Simchoni <uri@jdland.co.il>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 49a2206..d0fb10e 100644 (file)
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -184,10 +184,11 @@ static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len)
 static void setup_data_in(void)
 {
        struct req_progress *p = &cpg->p;
-       p->crypt_len =
+       int data_in_sram =
            min(p->hw_nbytes - p->hw_processed_bytes, cpg->max_req_size);
-       copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START,
-                       p->crypt_len);
+       copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START + p->crypt_len,
+                       data_in_sram - p->crypt_len);
+       p->crypt_len = data_in_sram;
 }
 
 static void mv_process_current_q(int first_block)
@@ -298,6 +299,7 @@ static void dequeue_complete_req(void)
                } while (need_copy_len > 0);
        }
 
+       cpg->p.crypt_len = 0;
 
        BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
        if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) {