[PATCH 5/5] crypto: mediatek: fix incorrect crypto key setting

[Vic Wu]

Record crypto key to context during setkey and set the key to
transform state buffer in encrypt/decrypt process.

Signed-off-by: Vic Wu <vic...@mediatek.com>
---
 drivers/crypto/mediatek/mtk-aes.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/mediatek/mtk-aes.c 
b/drivers/crypto/mediatek/mtk-aes.c
index 9eeb8b8d..05f21dc8 100644
--- a/drivers/crypto/mediatek/mtk-aes.c
+++ b/drivers/crypto/mediatek/mtk-aes.c
@@ -107,6 +107,7 @@ struct mtk_aes_reqctx {
 struct mtk_aes_base_ctx {
        struct mtk_cryp *cryp;
        u32 keylen;
+       __le32 key[12];
        __le32 keymode;
 
        mtk_aes_fn start;
@@ -541,6 +542,8 @@ static int mtk_aes_handle_queue(struct mtk_cryp *cryp, u8 
id,
                backlog->complete(backlog, -EINPROGRESS);
 
        ctx = crypto_tfm_ctx(areq->tfm);
+       /* Write key into state buffer */
+       memcpy(ctx->info.state, ctx->key, sizeof(ctx->key));
 
        aes->areq = areq;
        aes->ctx = ctx;
@@ -660,7 +663,7 @@ static int mtk_aes_setkey(struct crypto_ablkcipher *tfm,
        }
 
        ctx->keylen = SIZE_IN_WORDS(keylen);
-       mtk_aes_write_state_le(ctx->info.state, (const u32 *)key, keylen);
+       mtk_aes_write_state_le(ctx->key, (const u32 *)key, keylen);
 
        return 0;
 }
@@ -1093,10 +1096,8 @@ static int mtk_aes_gcm_setkey(struct crypto_aead *aead, 
const u8 *key,
        if (err)
                goto out;
 
-       /* Write key into state buffer */
-       mtk_aes_write_state_le(ctx->info.state, (const u32 *)key, keylen);
-       /* Write key(H) into state buffer */
-       mtk_aes_write_state_be(ctx->info.state + ctx->keylen, data->hash,
+       mtk_aes_write_state_le(ctx->key, (const u32 *)key, keylen);
+       mtk_aes_write_state_be(ctx->key + ctx->keylen, data->hash,
                               AES_BLOCK_SIZE);
 out:
        kzfree(data);
-- 
2.17.1