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| author | Ard Biesheuvel <ardb@kernel.org> | 2020-05-15 13:03:09 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-05-15 13:56:52 +0300 |
| commit | 93fa0af4790abdabf80ca0c4fff3f1629c84a56f (patch) | |
| tree | 348b7072b905b6af5e6098f84c58e1e53b13758f /sound | |
| parent | 5ae5eb48ca046adffbdff56a2f297d0896b83186 (diff) | |
| download | linux-93fa0af4790abdabf80ca0c4fff3f1629c84a56f.tar.xz | |
ASoC: cros_ec_codec: switch to library API for SHA-256
The CrOS EC codec driver uses SHA-256 explicitly, and not in a
performance critical manner, so there is really no point in using
the SHASH crypto API here. Let's switch to the library API instead.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Cc: Cheng-Yi Chiang <cychiang@chromium.org>
Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Benson Leung <bleung@chromium.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200515100309.20795-1-ardb@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/Kconfig | 3 | ||||
| -rw-r--r-- | sound/soc/codecs/cros_ec_codec.c | 23 |
2 files changed, 5 insertions, 21 deletions
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 44b8c4cde4f3..2d4f1b4bc011 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -538,8 +538,7 @@ config SND_SOC_CQ0093VC config SND_SOC_CROS_EC_CODEC tristate "codec driver for ChromeOS EC" depends on CROS_EC - select CRYPTO - select CRYPTO_SHA256 + select CRYPTO_LIB_SHA256 help If you say yes here you will get support for the ChromeOS Embedded Controller's Audio Codec. diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c index 1948bc6971f6..8d45c628e988 100644 --- a/sound/soc/codecs/cros_ec_codec.c +++ b/sound/soc/codecs/cros_ec_codec.c @@ -8,7 +8,6 @@ * EC for audio function. */ -#include <crypto/hash.h> #include <crypto/sha.h> #include <linux/acpi.h> #include <linux/delay.h> @@ -107,25 +106,11 @@ error: static int calculate_sha256(struct cros_ec_codec_priv *priv, uint8_t *buf, uint32_t size, uint8_t *digest) { - struct crypto_shash *tfm; - struct shash_desc *desc; + struct sha256_state sctx; - tfm = crypto_alloc_shash("sha256", CRYPTO_ALG_TYPE_SHASH, 0); - if (IS_ERR(tfm)) { - dev_err(priv->dev, "can't alloc shash\n"); - return PTR_ERR(tfm); - } - desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(tfm), GFP_KERNEL); - if (!desc) { - crypto_free_shash(tfm); - return -ENOMEM; - } - desc->tfm = tfm; - crypto_shash_digest(desc, buf, size, digest); - shash_desc_zero(desc); - - kfree(desc); - crypto_free_shash(tfm); + sha256_init(&sctx); + sha256_update(&sctx, buf, size); + sha256_final(&sctx, digest); #ifdef DEBUG { |