crypto: ctr - Use chainiv on raw counter mode

Raw counter mode only works with chainiv, which is no longer
the default IV generator on SMP machines.  This broke raw counter
mode as it can no longer instantiate as a givcipher.

This patch fixes it by always picking chainiv on raw counter
mode.  This is based on the diagnosis and a patch by Huang
Ying.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/ctr.c b/crypto/ctr.c
index 2d7425f0e7b816d9c236aae7bc635ab8f9145888..6c3bfabb9d1d1b7a54a675373b66d46b70310e32 100644 (file)
--- a/crypto/ctr.c
+++ b/crypto/ctr.c
@@ -219,6 +219,8 @@ static struct crypto_instance *crypto_ctr_alloc(struct rtattr **tb)
        inst->alg.cra_blkcipher.encrypt = crypto_ctr_crypt;
        inst->alg.cra_blkcipher.decrypt = crypto_ctr_crypt;
 
+       inst->alg.cra_blkcipher.geniv = "chainiv";
+
 out:
        crypto_mod_put(alg);
        return inst;