linux-kernel - Re: [PATCH] staging: rtl8712: Fix Sparse warnings in rtl871x_ioctl

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Date:   Mon, 20 Feb 2023 20:06:13 +0100
From:   Philipp Hortmann <philipp.g.hortmann@...il.com>
To:     Shibo Li <zzutcyha@....com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Florian Schilhabel <florian.c.schilhabel@...glemail.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8712: Fix Sparse warnings in
 rtl871x_ioctl_linux.c

On 2/20/23 15:37, Shibo Li wrote:
> This patch fixes the following warning in rtl871x_ioctl_linux.c
> 
> WARNING: Avoid multiple line dereference - prefer 'pnetwork->network.InfrastructureMode'
> +                                       if (pnetwork->network.
> +                                               InfrastructureMode
> 
> WARNING: Avoid multiple line dereference - prefer 'padapter->mlmepriv.cur_network.network'
> +                                               padapter->mlmepriv.
> +                                               cur_network.network.
> 
> WARNING: Avoid multiple line dereference - prefer 'cur_network.network.InfrastructureMode'
> +                                               cur_network.network.
> +                                               InfrastructureMode)
> 
> Signed-off-by: Shibo Li <zzutcyha@....com>
> ---
>   drivers/staging/rtl8712/rtl871x_ioctl_linux.c | 11 ++++-------
>   1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
> index 36f6904d25ab..6673befeb2f0 100644
> --- a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
> +++ b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
> @@ -1268,14 +1268,11 @@ static int r8711_wx_set_essid(struct net_device *dev,
>   			if ((!memcmp(dst_ssid, src_ssid, ndis_ssid.SsidLength))
>   			    && (pnetwork->network.Ssid.SsidLength ==
>   			     ndis_ssid.SsidLength)) {
> -				if (check_fwstate(pmlmepriv,
> -							WIFI_ADHOC_STATE)) {
> -					if (pnetwork->network.
> -						InfrastructureMode
> +				if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE)) {
> +					if (pnetwork->network.configurationInfrastructureMode
>   						!=
> -						padapter->mlmepriv.
> -						cur_network.network.
> -						InfrastructureMode)
> +						padapter->mlmepriv.assoc_by_rssi.
> +						cur_network.network.InfrastructureMode)
>   						continue;
>   				}
>

I get a compilation error when compiling with this patch.

drivers/staging/rtl8712/rtl871x_ioctl_linux.c: In function 
‘r8711_wx_set_essid’:
drivers/staging/rtl8712/rtl871x_ioctl_linux.c:1272:27: error: ‘struct 
wlan_bssid_ex’ has no member named ‘configurationInfrastructureMode’
  1272 |      if (pnetwork->network.configurationInfrastructureMode
       |                           ^
drivers/staging/rtl8712/rtl871x_ioctl_linux.c:1274:39: error: request 
for member ‘cur_network’ in something not a structure or union
  1274 |       padapter->mlmepriv.assoc_by_rssi.
       |                                       ^
make[1]: *** [scripts/Makefile.build:252: 
drivers/staging/rtl8712/rtl871x_ioctl_linux.o] Error 1
make: *** [Makefile:2021: drivers/staging/rtl8712] Error 2
make: Leaving directory '/home/kernel/Documents/git/kernels/staging'

Bye Philipp