crypto: algif_aead - fix invalid sgl linking

This patch fixes it.
Also minor updates to comments.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 4 insertions, 5 deletions

diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index 00a6fe166fed..69abada22373 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -33,7 +33,7 @@ struct aead_ctx {
         /*
          * RSGL_MAX_ENTRIES is an artificial limit where user space at maximum
          * can cause the kernel to allocate RSGL_MAX_ENTRIES * ALG_MAX_PAGES
-         * bytes
+         * pages
          */
 #define RSGL_MAX_ENTRIES ALG_MAX_PAGES
         struct af_alg_sgl rsgl[RSGL_MAX_ENTRIES];
@@ -435,11 +435,10 @@ static int aead_recvmsg(struct socket *sock, struct msghdr *msg, size_t ignored,
                 if (err < 0)
                         goto unlock;
                 usedpages += err;
-                /* chain the new scatterlist with initial list */
+                /* chain the new scatterlist with previous one */
                 if (cnt)
-                        scatterwalk_crypto_chain(ctx->rsgl[0].sg,
-                                        ctx->rsgl[cnt].sg, 1,
-                                        sg_nents(ctx->rsgl[cnt-1].sg));
+                        af_alg_link_sg(&ctx->rsgl[cnt-1], &ctx->rsgl[cnt]);
+
                 /* we do not need more iovecs as we have sufficient memory */
                 if (outlen <= usedpages)
                         break;