[PATCH 3/5] crypto: virtio - Drop superfluous ctx->tfm backpointer

[Lukas Wunner]

struct virtio_crypto_[as]kcipher_ctx contains a backpointer to struct
crypto_[as]kcipher which is superfluous in two ways:

First, it's not used anywhere.  Second, the context is embedded into
struct crypto_tfm, so one could just use container_of() to get from the
context to crypto_tfm and from there to crypto_[as]kcipher.

Drop the superfluous backpointer.

Signed-off-by: Lukas Wunner <lu...@wunner.de>
---
 drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 -----
 drivers/crypto/virtio/virtio_crypto_skcipher_algs.c | 4 ----
 2 files changed, 9 deletions(-)

diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c 
b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
index 7fdf32c79909..aa8255786d6c 100644
--- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
@@ -26,7 +26,6 @@ struct virtio_crypto_rsa_ctx {
 
 struct virtio_crypto_akcipher_ctx {
        struct virtio_crypto *vcrypto;
-       struct crypto_akcipher *tfm;
        bool session_valid;
        __u64 session_id;
        union {
@@ -447,10 +446,6 @@ static unsigned int virtio_crypto_rsa_max_size(struct 
crypto_akcipher *tfm)
 
 static int virtio_crypto_rsa_init_tfm(struct crypto_akcipher *tfm)
 {
-       struct virtio_crypto_akcipher_ctx *ctx = akcipher_tfm_ctx(tfm);
-
-       ctx->tfm = tfm;
-
        akcipher_set_reqsize(tfm,
                             sizeof(struct virtio_crypto_akcipher_request));
 
diff --git a/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c 
b/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
index 23c41d87d835..495fc655a51c 100644
--- a/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
@@ -17,7 +17,6 @@
 
 struct virtio_crypto_skcipher_ctx {
        struct virtio_crypto *vcrypto;
-       struct crypto_skcipher *tfm;
 
        struct virtio_crypto_sym_session_info enc_sess_info;
        struct virtio_crypto_sym_session_info dec_sess_info;
@@ -515,10 +514,7 @@ static int virtio_crypto_skcipher_decrypt(struct 
skcipher_request *req)
 
 static int virtio_crypto_skcipher_init(struct crypto_skcipher *tfm)
 {
-       struct virtio_crypto_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
-
        crypto_skcipher_set_reqsize(tfm, sizeof(struct 
virtio_crypto_sym_request));
-       ctx->tfm = tfm;
 
        return 0;
 }
-- 
2.43.0