[PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[Jiapeng Chong]

Variable bcntime_cfg is not effectively used, so delete it.

drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:6: warning: variable 'bcntime_cfg' set but not used.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4240
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c
index bd0b7e365edb..e1eb9d8203ab 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c
@@ -1552,7 +1552,6 @@ void rtl92se_set_beacon_related_registers(struct ieee80211_hw *hw)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
-	u16 bcntime_cfg = 0;
 	u16 bcn_cw = 6, bcn_ifs = 0xf;
 	u16 atim_window = 2;
 
@@ -1576,13 +1575,6 @@ void rtl92se_set_beacon_related_registers(struct ieee80211_hw *hw)
 	 * other ad hoc STA */
 	rtl_write_byte(rtlpriv, BCN_ERR_THRESH, 100);
 
-	/* Beacon Time Configuration */
-	if (mac->opmode == NL80211_IFTYPE_ADHOC)
-		bcntime_cfg |= (bcn_cw << BCN_TCFG_CW_SHIFT);
-
-	/* TODO: bcn_ifs may required to be changed on ASIC */
-	bcntime_cfg |= bcn_ifs << BCN_TCFG_IFS;
-
 	/*for beacon changed */
 	rtl92s_phy_set_beacon_hwreg(hw, mac->beacon_interval);
 }
-- 
2.20.1.7.g153144c

Re: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[kernel test robot]

Hi Jiapeng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jiapeng-Chong/rtlwifi-rtl8192se-Remove-the-unused-variable-bcntime_cfg/20230228-101333
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20230228021132.88910-1-jiapeng.chong%40linux.alibaba.com
patch subject: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230228/202302281153.D9CuZbhm-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/c8de031d7e616764eacd615d106a5484bacc675d
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jiapeng-Chong/rtlwifi-rtl8192se-Remove-the-unused-variable-bcntime_cfg/20230228-101333
        git checkout c8de031d7e616764eacd615d106a5484bacc675d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/wireless/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302281153.D9CuZbhm-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c: In function 'rtl92se_set_beacon_related_registers':
>> drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:25: warning: unused variable 'bcn_ifs' [-Wunused-variable]
    1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
         |                         ^~~~~~~
>> drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:13: warning: unused variable 'bcn_cw' [-Wunused-variable]
    1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
         |             ^~~~~~


vim +/bcn_ifs +1555 drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c

24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1550  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1551  void rtl92se_set_beacon_related_registers(struct ieee80211_hw *hw)
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1552  {
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1553  	struct rtl_priv *rtlpriv = rtl_priv(hw);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1554  	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03 @1555  	u16 bcn_cw = 6, bcn_ifs = 0xf;
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1556  	u16 atim_window = 2;
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1557  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1558  	/* ATIM Window (in unit of TU). */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1559  	rtl_write_word(rtlpriv, ATIMWND, atim_window);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1560  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1561  	/* Beacon interval (in unit of TU). */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1562  	rtl_write_word(rtlpriv, BCN_INTERVAL, mac->beacon_interval);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1563  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1564  	/* DrvErlyInt (in unit of TU). (Time to send
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1565  	 * interrupt to notify driver to change
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1566  	 * beacon content) */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1567  	rtl_write_word(rtlpriv, BCN_DRV_EARLY_INT, 10 << 4);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1568  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1569  	/* BcnDMATIM(in unit of us). Indicates the
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1570  	 * time before TBTT to perform beacon queue DMA  */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1571  	rtl_write_word(rtlpriv, BCN_DMATIME, 256);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1572  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1573  	/* Force beacon frame transmission even
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1574  	 * after receiving beacon frame from
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1575  	 * other ad hoc STA */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1576  	rtl_write_byte(rtlpriv, BCN_ERR_THRESH, 100);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1577  
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1578  	/*for beacon changed */
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1579  	rtl92s_phy_set_beacon_hwreg(hw, mac->beacon_interval);
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1580  }
24284531497def drivers/net/wireless/rtlwifi/rtl8192se/hw.c Chaoming Li 2011-05-03  1581  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Re: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[Simon Horman]

On Tue, Feb 28, 2023 at 10:11:32AM +0800, Jiapeng Chong wrote:
> Variable bcntime_cfg is not effectively used, so delete it.
> 
> drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:6: warning: variable 'bcntime_cfg' set but not used.
> 
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4240
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>

Hi Jiapeng Chong,

this looks good to me.

Reviewed-by: Simon Horman <simon.horman@corigine.com>

While reviewing this gcc 12.2.0 told me:

drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:25: error: unused variable 'bcn_ifs' [-Werror=unused-variable]
 1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
      |                         ^~~~~~~
drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:13: error: unused variable 'bcn_cw' [-Werror=unused-variable]
 1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
      |             ^~~~~~

So perhaps you could consider sending another patch to remove them too.

RE: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[Ping-Ke Shih]

> -----Original Message-----
> From: Simon Horman <simon.horman@corigine.com>
> Sent: Tuesday, February 28, 2023 7:07 PM
> To: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> Cc: Ping-Ke Shih <pkshih@realtek.com>; kvalo@kernel.org; davem@davemloft.net; edumazet@google.com;
> kuba@kernel.org; pabeni@redhat.com; linux-wireless@vger.kernel.org; netdev@vger.kernel.org;
> linux-kernel@vger.kernel.org; Abaci Robot <abaci@linux.alibaba.com>
> Subject: Re: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg
> 
> On Tue, Feb 28, 2023 at 10:11:32AM +0800, Jiapeng Chong wrote:
> > Variable bcntime_cfg is not effectively used, so delete it.
> >
> > drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:6: warning: variable 'bcntime_cfg' set but not
> used.
> >
> > Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> > Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4240
> > Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> 
> Hi Jiapeng Chong,
> 
> this looks good to me.
> 
> Reviewed-by: Simon Horman <simon.horman@corigine.com>
> 
> While reviewing this gcc 12.2.0 told me:
> 
> drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:25: error: unused variable 'bcn_ifs'
> [-Werror=unused-variable]
>  1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
>       |                         ^~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:13: error: unused variable 'bcn_cw'
> [-Werror=unused-variable]
>  1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
>       |             ^~~~~~
> 
> So perhaps you could consider sending another patch to remove them too.
> 

These errors are introduced by this patch, so please fix them together by this
patch.

Ping-Ke

Re: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg

[Simon Horman]

On Wed, Mar 01, 2023 at 12:32:38AM +0000, Ping-Ke Shih wrote:
> 
> 
> > -----Original Message-----
> > From: Simon Horman <simon.horman@corigine.com>
> > Sent: Tuesday, February 28, 2023 7:07 PM
> > To: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> > Cc: Ping-Ke Shih <pkshih@realtek.com>; kvalo@kernel.org; davem@davemloft.net; edumazet@google.com;
> > kuba@kernel.org; pabeni@redhat.com; linux-wireless@vger.kernel.org; netdev@vger.kernel.org;
> > linux-kernel@vger.kernel.org; Abaci Robot <abaci@linux.alibaba.com>
> > Subject: Re: [PATCH] rtlwifi: rtl8192se: Remove the unused variable bcntime_cfg
> > 
> > On Tue, Feb 28, 2023 at 10:11:32AM +0800, Jiapeng Chong wrote:
> > > Variable bcntime_cfg is not effectively used, so delete it.
> > >
> > > drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:6: warning: variable 'bcntime_cfg' set but not
> > used.
> > >
> > > Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> > > Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4240
> > > Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> > 
> > Hi Jiapeng Chong,
> > 
> > this looks good to me.
> > 
> > Reviewed-by: Simon Horman <simon.horman@corigine.com>
> > 
> > While reviewing this gcc 12.2.0 told me:
> > 
> > drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:25: error: unused variable 'bcn_ifs'
> > [-Werror=unused-variable]
> >  1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
> >       |                         ^~~~~~~
> > drivers/net/wireless/realtek/rtlwifi/rtl8192se/hw.c:1555:13: error: unused variable 'bcn_cw'
> > [-Werror=unused-variable]
> >  1555 |         u16 bcn_cw = 6, bcn_ifs = 0xf;
> >       |             ^~~~~~
> > 
> > So perhaps you could consider sending another patch to remove them too.
> > 
> 
> These errors are introduced by this patch, so please fix them together by this
> patch.

Yes, indeed. Sorry for missing that important point.
Had I noticed it my advice would have been the same as yours.