linux-kernel - Re: [PATCH] staging: rtl8723bs: simplify control flow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 1 Apr 2022 14:34:04 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Sevinj Aghayeva <sevinj.aghayeva@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        outreachy@...ts.linux.dev
Subject: Re: [PATCH] staging: rtl8723bs: simplify control flow

On Fri, Apr 01, 2022 at 07:46:35AM -0400, Sevinj Aghayeva wrote:
> The function iterates an index from 0 to NUM_PMKID_CACHE and returns
> the first index for which the condition is true. If no such index is
> found, the function returns -1. Current code has a complex control
> flow that obfuscates this simple task. Replace it with a loop.
> 
> Also, given the shortened function body, replace the long variable
> name psecuritypriv with a short variable name p.
> 
> Reported by checkpatch:
> 
> WARNING: else is not generally useful after a break or return
> 
> Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@...il.com>

Wow!  Nice find!  This is a huge clean up.  Extra kudos recognizing that it is
not just the else statement which is broken here!

The only issue for the patch is that I don't see any maintainer emailed?
However, I don't see a maintainer listed in the MAINTAINERS file so ...

Reviewed-by: Ira Weiny <ira.weiny@...el.com>

> ---
>  drivers/staging/rtl8723bs/core/rtw_mlme.c | 28 ++++++-----------------
>  1 file changed, 7 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> index d5bb3a5bd2fb..3eacf8f9d236 100644
> --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
> +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
> @@ -2036,28 +2036,14 @@ int rtw_restruct_wmm_ie(struct adapter *adapter, u8 *in_ie, u8 *out_ie, uint in_
>  
>  static int SecIsInPMKIDList(struct adapter *Adapter, u8 *bssid)
>  {
> -	struct security_priv *psecuritypriv = &Adapter->securitypriv;
> -	int i = 0;
> -
> -	do {
> -		if ((psecuritypriv->PMKIDList[i].bUsed) &&
> -				(!memcmp(psecuritypriv->PMKIDList[i].Bssid, bssid, ETH_ALEN))) {
> -			break;
> -		} else {
> -			i++;
> -			/* continue; */
> -		}
> -
> -	} while (i < NUM_PMKID_CACHE);
> -
> -	if (i == NUM_PMKID_CACHE) {
> -		i = -1;/*  Could not find. */
> -	} else {
> -		/*  There is one Pre-Authentication Key for the specific BSSID. */
> -	}
> -
> -	return i;
> +	struct security_priv *p = &Adapter->securitypriv;
> +	int i;
>  
> +	for (i = 0; i < NUM_PMKID_CACHE; i++)
> +		if ((p->PMKIDList[i].bUsed) &&
> +				(!memcmp(p->PMKIDList[i].Bssid, bssid, ETH_ALEN)))
> +			return i;
> +	return -1;
>  }
>  
>  /*  */
> -- 
> 2.25.1
>