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| author | Uri Simchoni <uri@jdland.co.il> | 2010-04-08 19:26:34 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-04-13 16:50:47 +0800 |
| commit | f565e67ec1b8f4a95d21550f9b879fe86b4132e0 (patch) | |
| tree | 6b28a4f9cc75145f985615087b6e33e59cec550c /drivers/crypto/mv_cesa.c | |
| parent | 6bc6fcd609080461682c5cc0a1e3bf4345d6419d (diff) | |
| download | linux-f565e67ec1b8f4a95d21550f9b879fe86b4132e0.tar.bz2 | |
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.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c index 37d9f0688e75..018a95ce0c9b 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) { |