tls: remove tls_context argument from tls_set_device_offload

It's not really needed since we end up refetching it as tls_ctx. We
can also remove the NULL check, since we have already dereferenced ctx
in do_tls_setsockopt_conf.

While at it, fix up the reverse xmas tree ordering.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tls/tls.h

@@ -227,7 +227,7 @@ static inline bool tls_strp_msg_mixed_decrypted(struct tls_sw_context_rx *ctx)
 #ifdef CONFIG_TLS_DEVICE
 int tls_device_init(void);
 void tls_device_cleanup(void);
-int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
+int tls_set_device_offload(struct sock *sk);
 void tls_device_free_resources_tx(struct sock *sk);
 int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
 void tls_device_offload_cleanup_rx(struct sock *sk);
@@ -238,7 +238,7 @@ static inline int tls_device_init(void) { return 0; }
 static inline void tls_device_cleanup(void) {}
 
 static inline int
-tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
+tls_set_device_offload(struct sock *sk)
 {
 	return -EOPNOTSUPP;
 }

net/tls/tls_device.c

@@ -1057,21 +1057,21 @@ static struct tls_offload_context_tx *alloc_offload_ctx_tx(struct tls_context *c
 	return offload_ctx;
 }
 
-int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
+int tls_set_device_offload(struct sock *sk)
 {
-	struct tls_context *tls_ctx = tls_get_ctx(sk);
-	struct tls_prot_info *prot = &tls_ctx->prot_info;
-	const struct tls_cipher_desc *cipher_desc;
 	struct tls_record_info *start_marker_record;
 	struct tls_offload_context_tx *offload_ctx;
+	const struct tls_cipher_desc *cipher_desc;
 	struct tls_crypto_info *crypto_info;
+	struct tls_prot_info *prot;
 	struct net_device *netdev;
-	char *iv, *rec_seq;
+	struct tls_context *ctx;
 	struct sk_buff *skb;
+	char *iv, *rec_seq;
 	int rc;
 
-	if (!ctx)
-		return -EINVAL;
+	ctx = tls_get_ctx(sk);
+	prot = &ctx->prot_info;
 
 	if (ctx->priv_ctx_tx)
 		return -EEXIST;

net/tls/tls_main.c

@@ -657,7 +657,7 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
 	}
 
 	if (tx) {
-		rc = tls_set_device_offload(sk, ctx);
+		rc = tls_set_device_offload(sk);
 		conf = TLS_HW;
 		if (!rc) {
 			TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);