140 static int lrw_xor_tweak(struct skcipher_request *req, bool second_pass)  in lrw_xor_tweak()  argument
143 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);  in lrw_xor_tweak()
145 	struct lrw_request_ctx *rctx = skcipher_request_ctx(req);  in lrw_xor_tweak()
153 		req = &rctx->subreq;  in lrw_xor_tweak()
155 		skcipher_request_set_tfm(req, tfm);  in lrw_xor_tweak()
158 	err = skcipher_walk_virt(&w, req, false);  in lrw_xor_tweak()
198 static int lrw_xor_tweak_pre(struct skcipher_request *req)  in lrw_xor_tweak_pre()  argument
200 	return lrw_xor_tweak(req, false);  in lrw_xor_tweak_pre()
203 static int lrw_xor_tweak_post(struct skcipher_request *req)  in lrw_xor_tweak_post()  argument
205 	return lrw_xor_tweak(req, true);  in lrw_xor_tweak_post()
210 	struct skcipher_request *req = areq->data;  in lrw_crypt_done()  local
213 		struct lrw_request_ctx *rctx = skcipher_request_ctx(req);  in lrw_crypt_done()
216 		err = lrw_xor_tweak_post(req);  in lrw_crypt_done()
219 	skcipher_request_complete(req, err);  in lrw_crypt_done()
222 static void lrw_init_crypt(struct skcipher_request *req)  in lrw_init_crypt()  argument
225 		crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));  in lrw_init_crypt()
226 	struct lrw_request_ctx *rctx = skcipher_request_ctx(req);  in lrw_init_crypt()
230 	skcipher_request_set_callback(subreq, req->base.flags, lrw_crypt_done,  in lrw_init_crypt()
231 				      req);  in lrw_init_crypt()
233 	skcipher_request_set_crypt(subreq, req->dst, req->dst,  in lrw_init_crypt()
234 				   req->cryptlen, req->iv);  in lrw_init_crypt()
237 	memcpy(&rctx->t, req->iv, sizeof(rctx->t));  in lrw_init_crypt()
243 static int lrw_encrypt(struct skcipher_request *req)  in lrw_encrypt()  argument
245 	struct lrw_request_ctx *rctx = skcipher_request_ctx(req);  in lrw_encrypt()
248 	lrw_init_crypt(req);  in lrw_encrypt()
249 	return lrw_xor_tweak_pre(req) ?:  in lrw_encrypt()
251 		lrw_xor_tweak_post(req);  in lrw_encrypt()
254 static int lrw_decrypt(struct skcipher_request *req)  in lrw_decrypt()  argument
256 	struct lrw_request_ctx *rctx = skcipher_request_ctx(req);  in lrw_decrypt()
259 	lrw_init_crypt(req);  in lrw_decrypt()
260 	return lrw_xor_tweak_pre(req) ?:  in lrw_decrypt()
262 		lrw_xor_tweak_post(req);  in lrw_decrypt()