linux-kernel - Re: [PATCH 1/3] staging: rtl8723bs: remove unused variable ret in hal/sdio

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Date:   Mon, 12 Apr 2021 13:57:17 +0200
From:   Fabio Aiuto <fabioaiuto83@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        lkp@...el.com
Subject: Re: [PATCH 1/3] staging: rtl8723bs: remove unused variable ret in
 hal/sdio_halinit.c

On Mon, Apr 12, 2021 at 11:38:48AM +0200, Greg KH wrote:
> On Sun, Apr 11, 2021 at 02:57:35PM +0200, Fabio Aiuto wrote:
> > fix following compiler warning issue:
> > 
> >    drivers/staging/rtl8723bs/hal/sdio_halinit.c:
> >  In function 'CardDisableRTL8723BSdio':
> > >> drivers/staging/rtl8723bs/hal/sdio_halinit.c:881:5:
> > warning: variable 'ret' set but not used [-Wunused-but-set-variable]
> >      881 |  u8 ret = _FAIL;
> >          |     ^~~
> > 
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Fabio Aiuto <fabioaiuto83@...il.com>
> > ---
> >  drivers/staging/rtl8723bs/hal/sdio_halinit.c | 6 ++----
> >  1 file changed, 2 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/staging/rtl8723bs/hal/sdio_halinit.c b/drivers/staging/rtl8723bs/hal/sdio_halinit.c
> > index 2098384efe92..936181a73d73 100644
> > --- a/drivers/staging/rtl8723bs/hal/sdio_halinit.c
> > +++ b/drivers/staging/rtl8723bs/hal/sdio_halinit.c
> > @@ -878,10 +878,9 @@ static void CardDisableRTL8723BSdio(struct adapter *padapter)
> >  {
> >  	u8 u1bTmp;
> >  	u8 bMacPwrCtrlOn;
> > -	u8 ret = _FAIL;
> >  
> >  	/*  Run LPS WL RFOFF flow */
> > -	ret = HalPwrSeqCmdParsing(padapter, PWR_CUT_ALL_MSK, PWR_FAB_ALL_MSK, PWR_INTF_SDIO_MSK, rtl8723B_enter_lps_flow);
> > +	HalPwrSeqCmdParsing(padapter, PWR_CUT_ALL_MSK, PWR_FAB_ALL_MSK, PWR_INTF_SDIO_MSK, rtl8723B_enter_lps_flow);
> >  
> >  	/* 	==== Reset digital sequence   ====== */
> >  
> > @@ -909,9 +908,8 @@ static void CardDisableRTL8723BSdio(struct adapter *padapter)
> >  	/* 	==== Reset digital sequence end ====== */
> >  
> >  	bMacPwrCtrlOn = false;	/*  Disable CMD53 R/W */
> > -	ret = false;
> >  	rtw_hal_set_hwreg(padapter, HW_VAR_APFM_ON_MAC, &bMacPwrCtrlOn);
> > -	ret = HalPwrSeqCmdParsing(padapter, PWR_CUT_ALL_MSK, PWR_FAB_ALL_MSK, PWR_INTF_SDIO_MSK, rtl8723B_card_disable_flow);
> > +	HalPwrSeqCmdParsing(padapter, PWR_CUT_ALL_MSK, PWR_FAB_ALL_MSK, PWR_INTF_SDIO_MSK, rtl8723B_card_disable_flow);
> >  }
> 
> Why isn't the return value being checked and returned to the caller if
> something goes wrong?  Ignoring it feels wrong to me.
> 
> thanks,
> 
> greg k-h

ok, I will propagate the return value to the whole caller chain.
CardDisableRTL8723BSdio returns void, will change this to u8...

thank you,

fabio