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authorUri Simchoni <uri@jdland.co.il>2010-04-08 19:26:34 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2010-04-13 16:50:47 +0800
commitf565e67ec1b8f4a95d21550f9b879fe86b4132e0 (patch)
tree6b28a4f9cc75145f985615087b6e33e59cec550c /drivers/crypto/mv_cesa.c
parent6bc6fcd609080461682c5cc0a1e3bf4345d6419d (diff)
crypto: mv_cesa - Fix situation where the dest sglist is organized differently than the source sglist
Bugfix for situations where the destination scatterlist has a different buffer structure than the source scatterlist (e.g. source has one 2K buffer and dest has 2 1K buffers) Signed-off-by: Uri Simchoni <uri@jdland.co.il> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/mv_cesa.c')
-rw-r--r--drivers/crypto/mv_cesa.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 37d9f0688e7..018a95ce0c9 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -242,6 +242,8 @@ static void dequeue_complete_req(void)
struct ablkcipher_request *req = cpg->cur_req;
void *buf;
int ret;
+ int need_copy_len = cpg->p.crypt_len;
+ int sram_offset = 0;
cpg->p.total_req_bytes += cpg->p.crypt_len;
do {
@@ -257,14 +259,16 @@ static void dequeue_complete_req(void)
buf = cpg->p.dst_sg_it.addr;
buf += cpg->p.dst_start;
- dst_copy = min(cpg->p.crypt_len, cpg->p.sg_dst_left);
-
- memcpy(buf, cpg->sram + SRAM_DATA_OUT_START, dst_copy);
+ dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
+ memcpy(buf,
+ cpg->sram + SRAM_DATA_OUT_START + sram_offset,
+ dst_copy);
+ sram_offset += dst_copy;
cpg->p.sg_dst_left -= dst_copy;
- cpg->p.crypt_len -= dst_copy;
+ need_copy_len -= dst_copy;
cpg->p.dst_start += dst_copy;
- } while (cpg->p.crypt_len > 0);
+ } while (need_copy_len > 0);
BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
if (cpg->p.total_req_bytes < req->nbytes) {