142 static int xor_tweak(struct skcipher_request *req, bool second_pass)  in xor_tweak()  argument
145 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);  in xor_tweak()
147 	struct rctx *rctx = skcipher_request_ctx(req);  in xor_tweak()
155 		req = &rctx->subreq;  in xor_tweak()
157 		skcipher_request_set_tfm(req, tfm);  in xor_tweak()
160 	err = skcipher_walk_virt(&w, req, false);  in xor_tweak()
199 static int xor_tweak_pre(struct skcipher_request *req)  in xor_tweak_pre()  argument
201 	return xor_tweak(req, false);  in xor_tweak_pre()
204 static int xor_tweak_post(struct skcipher_request *req)  in xor_tweak_post()  argument
206 	return xor_tweak(req, true);  in xor_tweak_post()
211 	struct skcipher_request *req = areq->data;  in crypt_done()  local
214 		struct rctx *rctx = skcipher_request_ctx(req);  in crypt_done()
217 		err = xor_tweak_post(req);  in crypt_done()
220 	skcipher_request_complete(req, err);  in crypt_done()
223 static void init_crypt(struct skcipher_request *req)  in init_crypt()  argument
225 	struct priv *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));  in init_crypt()
226 	struct rctx *rctx = skcipher_request_ctx(req);  in init_crypt()
230 	skcipher_request_set_callback(subreq, req->base.flags, crypt_done, req);  in init_crypt()
232 	skcipher_request_set_crypt(subreq, req->dst, req->dst,  in init_crypt()
233 				   req->cryptlen, req->iv);  in init_crypt()
236 	memcpy(&rctx->t, req->iv, sizeof(rctx->t));  in init_crypt()
242 static int encrypt(struct skcipher_request *req)  in encrypt()  argument
244 	struct rctx *rctx = skcipher_request_ctx(req);  in encrypt()
247 	init_crypt(req);  in encrypt()
248 	return xor_tweak_pre(req) ?:  in encrypt()
250 		xor_tweak_post(req);  in encrypt()
253 static int decrypt(struct skcipher_request *req)  in decrypt()  argument
255 	struct rctx *rctx = skcipher_request_ctx(req);  in decrypt()
258 	init_crypt(req);  in decrypt()
259 	return xor_tweak_pre(req) ?:  in decrypt()
261 		xor_tweak_post(req);  in decrypt()