linux-kernel - Re: [PATCH] staging: r8188eu: convert three functions to bool

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Date:   Sat, 5 Nov 2022 11:06:56 +0000
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Michael Straube <straube.linux@...il.com>
Cc:     gregkh@...uxfoundation.org, Larry.Finger@...inger.net,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: r8188eu: convert three functions to bool

On Sat, Nov 05, 2022 at 10:39:16AM +0100, Michael Straube wrote:
> The functions
> 
> is_client_associated_to_ap()
> is_client_associated_to_ibss()
> is_IBSS_empty()
> 
> return boolean values. Convert their return type to bool and replace
> _FAIL, which is defined as 0, with false. Another step to get rid of
> _SUCCESS / _FAIL.
> 
> Signed-off-by: Michael Straube <straube.linux@...il.com>
> ---
>  drivers/staging/r8188eu/core/rtw_wlan_util.c   | 18 +++++++++---------
>  drivers/staging/r8188eu/include/rtw_mlme_ext.h |  6 +++---
>  2 files changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/staging/r8188eu/core/rtw_wlan_util.c b/drivers/staging/r8188eu/core/rtw_wlan_util.c
> index e50631848cab..c95438a12b59 100644
> --- a/drivers/staging/r8188eu/core/rtw_wlan_util.c
> +++ b/drivers/staging/r8188eu/core/rtw_wlan_util.c
> @@ -331,35 +331,35 @@ u16 get_beacon_interval(struct wlan_bssid_ex *bss)
>  	return le16_to_cpu(val);
>  }
>  
> -int is_client_associated_to_ap(struct adapter *padapter)
> +bool is_client_associated_to_ap(struct adapter *padapter)
>  {
>  	struct mlme_ext_priv	*pmlmeext;
>  	struct mlme_ext_info	*pmlmeinfo;
>  
>  	if (!padapter)
> -		return _FAIL;
> +		return false;
>  
>  	pmlmeext = &padapter->mlmeextpriv;
>  	pmlmeinfo = &pmlmeext->mlmext_info;
>  
>  	if ((pmlmeinfo->state & WIFI_FW_ASSOC_SUCCESS) && ((pmlmeinfo->state & 0x03) == WIFI_FW_STATION_STATE))
>  		return true;
> -	else
> -		return _FAIL;
> +
> +	return false;
>  }
>  
> -int is_client_associated_to_ibss(struct adapter *padapter)
> +bool is_client_associated_to_ibss(struct adapter *padapter)
>  {
>  	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
>  	struct mlme_ext_info	*pmlmeinfo = &pmlmeext->mlmext_info;
>  
>  	if ((pmlmeinfo->state & WIFI_FW_ASSOC_SUCCESS) && ((pmlmeinfo->state & 0x03) == WIFI_FW_ADHOC_STATE))
>  		return true;
> -	else
> -		return _FAIL;
> +
> +	return false;
>  }
>  
> -int is_IBSS_empty(struct adapter *padapter)
> +bool is_IBSS_empty(struct adapter *padapter)
>  {
>  	unsigned int i;
>  	struct mlme_ext_priv	*pmlmeext = &padapter->mlmeextpriv;
> @@ -367,7 +367,7 @@ int is_IBSS_empty(struct adapter *padapter)
>  
>  	for (i = IBSS_START_MAC_ID; i < NUM_STA; i++) {
>  		if (pmlmeinfo->FW_sta_info[i].status == 1)
> -			return _FAIL;
> +			return false;
>  	}
>  	return true;
>  }
> diff --git a/drivers/staging/r8188eu/include/rtw_mlme_ext.h b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
> index e234a3b9af6f..7652e72a03f4 100644
> --- a/drivers/staging/r8188eu/include/rtw_mlme_ext.h
> +++ b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
> @@ -432,9 +432,9 @@ void update_network(struct wlan_bssid_ex *dst, struct wlan_bssid_ex *src,
>  u8 *get_my_bssid(struct wlan_bssid_ex *pnetwork);
>  u16 get_beacon_interval(struct wlan_bssid_ex *bss);
>  
> -int is_client_associated_to_ap(struct adapter *padapter);
> -int is_client_associated_to_ibss(struct adapter *padapter);
> -int is_IBSS_empty(struct adapter *padapter);
> +bool is_client_associated_to_ap(struct adapter *padapter);
> +bool is_client_associated_to_ibss(struct adapter *padapter);
> +bool is_IBSS_empty(struct adapter *padapter);
>  
>  unsigned char check_assoc_AP(u8 *pframe, uint len);
>  
> -- 
> 2.38.0
> 

Hi Michael,

Thanks for the patch. Just my personal opinion, but I would prefer to
keep the return type as int, and have 0 for success and then _FAIL
replaced with an appropriate error code depending on the circumstance,
(e.g. -ENOMEM). This is generally the convention elsewhere in the
kernel. Others may not agree though.

All the best,
Phil