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-rw-r--r--target/linux/ipq40xx/patches-4.19/046-crypto-qce-initialize-fallback-only-for-AES.patch54
1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/ipq40xx/patches-4.19/046-crypto-qce-initialize-fallback-only-for-AES.patch b/target/linux/ipq40xx/patches-4.19/046-crypto-qce-initialize-fallback-only-for-AES.patch
new file mode 100644
index 0000000000..e3adaf864e
--- /dev/null
+++ b/target/linux/ipq40xx/patches-4.19/046-crypto-qce-initialize-fallback-only-for-AES.patch
@@ -0,0 +1,54 @@
+From f2a33ce18232919d3831d1c61a06b6067209282d Mon Sep 17 00:00:00 2001
+From: Eneas U de Queiroz <cotequeiroz@gmail.com>
+Date: Fri, 22 Nov 2019 09:34:29 -0300
+Subject: [PATCH] crypto: qce - initialize fallback only for AES
+
+Adjust cra_flags to add CRYPTO_NEED_FALLBACK only for AES ciphers, where
+AES-192 is not handled by the qce hardware, and don't allocate & free
+the fallback skcipher for anything other than AES.
+
+The rest of the code is unchanged, as the use of the fallback is already
+restricted to AES.
+
+Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
+
+--- a/drivers/crypto/qce/skcipher.c
++++ b/drivers/crypto/qce/skcipher.c
+@@ -246,7 +246,15 @@ static int qce_skcipher_init(struct cryp
+
+ memset(ctx, 0, sizeof(*ctx));
+ crypto_skcipher_set_reqsize(tfm, sizeof(struct qce_cipher_reqctx));
++ return 0;
++}
++
++static int qce_skcipher_init_fallback(struct crypto_skcipher *tfm)
++{
++ struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
++ int ret;
+
++ qce_skcipher_init(tfm);
+ ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(&tfm->base),
+ 0, CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK);
+@@ -375,14 +383,18 @@ static int qce_skcipher_register_one(con
+
+ alg->base.cra_priority = 300;
+ alg->base.cra_flags = CRYPTO_ALG_ASYNC |
+- CRYPTO_ALG_NEED_FALLBACK |
+ CRYPTO_ALG_KERN_DRIVER_ONLY;
+ alg->base.cra_ctxsize = sizeof(struct qce_cipher_ctx);
+ alg->base.cra_alignmask = 0;
+ alg->base.cra_module = THIS_MODULE;
+
+- alg->init = qce_skcipher_init;
+- alg->exit = qce_skcipher_exit;
++ if (IS_AES(def->flags)) {
++ alg->base.cra_flags |= CRYPTO_ALG_NEED_FALLBACK;
++ alg->init = qce_skcipher_init_fallback;
++ alg->exit = qce_skcipher_exit;
++ } else {
++ alg->init = qce_skcipher_init;
++ }
+
+ INIT_LIST_HEAD(&tmpl->entry);
+ tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_SKCIPHER;