crypto: talitos - fix icv management on outbound direction
For IPsec encryption, in the case when:
-the input buffer is fragmented (edesc->src_nents > 0)
-the output buffer is not fragmented (edesc->dst_nents = 0)
the ICV is not output in the link table, but after the encrypted payload.
Copying the ICV must be avoided in this case; consequently the condition
edesc->dma_len > 0 must be more specific, i.e. must depend on the type
of the output buffer - fragmented or not.
Testing was performed by modifying testmgr to support src != dst,
since currently native kernel IPsec does in-place encryption
(src == dst).
Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index b299f09..8653f60 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -825,7 +825,7 @@
ipsec_esp_unmap(dev, edesc, areq);
/* copy the generated ICV to dst */
- if (edesc->dma_len) {
+ if (edesc->dst_nents) {
icvdata = &edesc->link_tbl[edesc->src_nents +
edesc->dst_nents + 2];
sg = sg_last(areq->dst, edesc->dst_nents);