crypto: tegra-aes: Hack to disable HW AES for dm-crypt

The hardware aes engine is required for key management for
HDCP, but since it's performance is bad, we don't want it
enabled for dm-crypt.  This hack changes the cra_name field
so dm-crypt won't find a match, but leaves the cra_driver_name
field unchanged to the device file interface will still find it.

Signed-off-by: Ken Sumrall <ksumrall@android.com>

diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c
index 16e3cec70731da58534364860a859a474abc6bdc..f7dd72964f0c2830e28d3e9f7a66f82e719d7d04 100644 (file)
--- a/drivers/crypto/tegra-aes.c
+++ b/drivers/crypto/tegra-aes.c
@@ -898,7 +898,7 @@ static int tegra_aes_cra_init(struct crypto_tfm *tfm)
 
 static struct crypto_alg algs[] = {
        {
-               .cra_name = "ecb(aes)",
+               .cra_name = "disabled_ecb(aes)",
                .cra_driver_name = "ecb-aes-tegra",
                .cra_priority = 100,
                .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
@@ -916,7 +916,7 @@ static struct crypto_alg algs[] = {
                        .decrypt = tegra_aes_ecb_decrypt,
                },
        }, {
-               .cra_name = "cbc(aes)",
+               .cra_name = "disabled_cbc(aes)",
                .cra_driver_name = "cbc-aes-tegra",
                .cra_priority = 100,
                .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
@@ -935,7 +935,7 @@ static struct crypto_alg algs[] = {
                        .decrypt = tegra_aes_cbc_decrypt,
                }
        }, {
-               .cra_name = "ansi_cprng",
+               .cra_name = "disabled_ansi_cprng",
                .cra_driver_name = "rng-aes-tegra",
                .cra_priority = 100,
                .cra_flags = CRYPTO_ALG_TYPE_RNG,