crypto: echainiv - Use skcipher

This patch replaces use of the obsolete blkcipher with skcipher.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/echainiv.c

@@ -20,6 +20,7 @@
 
 #include <crypto/internal/geniv.h>
 #include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -112,13 +113,16 @@ static int echainiv_encrypt(struct aead_request *req)
 	info = req->iv;
 
 	if (req->src != req->dst) {
-		struct blkcipher_desc desc = {
-			.tfm = ctx->null,
-		};
+		SKCIPHER_REQUEST_ON_STACK(nreq, ctx->sknull);
 
-		err = crypto_blkcipher_encrypt(
-			&desc, req->dst, req->src,
-			req->assoclen + req->cryptlen);
+		skcipher_request_set_tfm(nreq, ctx->sknull);
+		skcipher_request_set_callback(nreq, req->base.flags,
+					      NULL, NULL);
+		skcipher_request_set_crypt(nreq, req->src, req->dst,
+					   req->assoclen + req->cryptlen,
+					   NULL);
+
+		err = crypto_skcipher_encrypt(nreq);
 		if (err)
 			return err;
 	}