Re: [Outreachy kernel] [PATCH] Staging: ccree: Merge assignment with return

[Julia Lawall <julia.lawall@lip6.fr>]

On Sat, 9 Sep 2017, Srishti Sharma wrote:

> Return the return value of a function directly, instead of first saving it in a variable and then returning it. This change was made using the following

Your commit message should respect the 80 character limit. The above is
one very long line.

> semantic patch by coccinelle.
>
> @@
> local idexpression ret;
> expression e;
> @@
>
> -ret =
> +return
>      e;
> -return ret;
>
> Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
> ---
>  drivers/staging/ccree/ssi_aead.c | 21 ++++++---------------
>  1 file changed, 6 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/staging/ccree/ssi_aead.c b/drivers/staging/ccree/ssi_aead.c
> index 5abe6b2..6bb98f7 100644
> --- a/drivers/staging/ccree/ssi_aead.c
> +++ b/drivers/staging/ccree/ssi_aead.c
> @@ -651,17 +651,14 @@ ssi_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
>  static int ssi_rfc4309_ccm_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
>  {
>  	struct ssi_aead_ctx *ctx = crypto_aead_ctx(tfm);
> -	int rc = 0;
> -
> +

I'm not sure what happened here, but you should not be removing and then
adding back a blank line.  Likewise below.

julia

>  	if (keylen < 3)
>  		return -EINVAL;
>
>  	keylen -= 3;
>  	memcpy(ctx->ctr_nonce, key + keylen, 3);
>
> -	rc = ssi_aead_setkey(tfm, key, keylen);
> -
> -	return rc;
> +	return ssi_aead_setkey(tfm, key, keylen);
>  }
>  #endif /*SSI_CC_HAS_AES_CCM*/
>
> @@ -2214,8 +2211,7 @@ static int ssi_rfc4309_ccm_decrypt(struct aead_request *req)
>  static int ssi_rfc4106_gcm_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
>  {
>  	struct ssi_aead_ctx *ctx = crypto_aead_ctx(tfm);
> -	int rc = 0;
> -
> +
>  	SSI_LOG_DEBUG("%s()  keylen %d, key %p\n", __func__, keylen, key);
>
>  	if (keylen < 4)
> @@ -2224,16 +2220,13 @@ static int ssi_rfc4106_gcm_setkey(struct crypto_aead *tfm, const u8 *key, unsign
>  	keylen -= 4;
>  	memcpy(ctx->ctr_nonce, key + keylen, 4);
>
> -	rc = ssi_aead_setkey(tfm, key, keylen);
> -
> -	return rc;
> +	return ssi_aead_setkey(tfm, key, keylen);
>  }
>
>  static int ssi_rfc4543_gcm_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
>  {
>  	struct ssi_aead_ctx *ctx = crypto_aead_ctx(tfm);
> -	int rc = 0;
> -
> +
>  	SSI_LOG_DEBUG("%s()  keylen %d, key %p\n", __func__, keylen, key);
>
>  	if (keylen < 4)
> @@ -2242,9 +2235,7 @@ static int ssi_rfc4543_gcm_setkey(struct crypto_aead *tfm, const u8 *key, unsign
>  	keylen -= 4;
>  	memcpy(ctx->ctr_nonce, key + keylen, 4);
>
> -	rc = ssi_aead_setkey(tfm, key, keylen);
> -
> -	return rc;
> +	return ssi_aead_setkey(tfm, key, keylen);
>  }
>
>  static int ssi_gcm_setauthsize(struct crypto_aead *authenc,
> --
> 2.7.4
>
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