+ struct crypto_tfm *tfm = desc->tfm;
+ void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block;
+ int bsize = crypto_tfm_alg_blocksize(tfm);
+
+ u8 stack[src == dst ? bsize : 0];
+ u8 *buf = stack;
+ u8 **dst_p = src == dst ? &buf : &dst;
+
+ void (*fn)(void *, u8 *, const u8 *) = desc->crfn;
+ u8 *iv = desc->info;
+ unsigned int done = 0;
+
+ do {
+ u8 *tmp_dst = *dst_p;
+
+ fn(crypto_tfm_ctx(tfm), tmp_dst, src);
+ xor(tmp_dst, iv);
+ memcpy(iv, src, bsize);
+ if (tmp_dst != dst)
+ memcpy(dst, tmp_dst, bsize);
+
+ src += bsize;
+ dst += bsize;
+ } while ((done += bsize) < nbytes);
+
+ return done;
+}
+
+static unsigned int ecb_process(const struct cipher_desc *desc, u8 *dst,
+ const u8 *src, unsigned int nbytes)
+{
+ struct crypto_tfm *tfm = desc->tfm;
+ int bsize = crypto_tfm_alg_blocksize(tfm);
+ void (*fn)(void *, u8 *, const u8 *) = desc->crfn;
+ unsigned int done = 0;
+
+ do {
+ fn(crypto_tfm_ctx(tfm), dst, src);
+
+ src += bsize;
+ dst += bsize;
+ } while ((done += bsize) < nbytes);
+
+ return done;