net/mlx5e: Convert single case statement switch statements into if statements

During the review of commit 1ff2f0fa450e ("net/mlx5e: Return in default
case statement in tx_post_resync_params"), Leon and Nick pointed out
that the switch statements can be converted to single if statements
that return early so that the code is easier to follow.

Suggested-by: Leon Romanovsky <leon@kernel.org>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
index 5c08891..ea032f5 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
@@ -25,23 +25,17 @@ static void
 fill_static_params_ctx(void *ctx, struct mlx5e_ktls_offload_context_tx *priv_tx)
 {
        struct tls_crypto_info *crypto_info = priv_tx->crypto_info;
+       struct tls12_crypto_info_aes_gcm_128 *info;
        char *initial_rn, *gcm_iv;
        u16 salt_sz, rec_seq_sz;
        char *salt, *rec_seq;
        u8 tls_version;
 
-       switch (crypto_info->cipher_type) {
-       case TLS_CIPHER_AES_GCM_128: {
-               struct tls12_crypto_info_aes_gcm_128 *info =
-                       (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
-
-               EXTRACT_INFO_FIELDS;
-               break;
-       }
-       default:
-               WARN_ON(1);
+       if (WARN_ON(crypto_info->cipher_type != TLS_CIPHER_AES_GCM_128))
                return;
-       }
+
+       info = (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
+       EXTRACT_INFO_FIELDS;
 
        gcm_iv      = MLX5_ADDR_OF(tls_static_params, ctx, gcm_iv);
        initial_rn  = MLX5_ADDR_OF(tls_static_params, ctx, initial_record_number);
@@ -234,24 +228,18 @@ tx_post_resync_params(struct mlx5e_txqsq *sq,
                      u64 rcd_sn)
 {
        struct tls_crypto_info *crypto_info = priv_tx->crypto_info;
+       struct tls12_crypto_info_aes_gcm_128 *info;
        __be64 rn_be = cpu_to_be64(rcd_sn);
        bool skip_static_post;
        u16 rec_seq_sz;
        char *rec_seq;
 
-       switch (crypto_info->cipher_type) {
-       case TLS_CIPHER_AES_GCM_128: {
-               struct tls12_crypto_info_aes_gcm_128 *info =
-                       (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
-
-               rec_seq = info->rec_seq;
-               rec_seq_sz = sizeof(info->rec_seq);
-               break;
-       }
-       default:
-               WARN_ON(1);
+       if (WARN_ON(crypto_info->cipher_type != TLS_CIPHER_AES_GCM_128))
                return;
-       }
+
+       info = (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
+       rec_seq = info->rec_seq;
+       rec_seq_sz = sizeof(info->rec_seq);
 
        skip_static_post = !memcmp(rec_seq, &rn_be, rec_seq_sz);
        if (!skip_static_post)