linux-kernel - Re: [Outreachy kernel] [PATCH] :staging: rtl8723bs: Remove useless led_blink

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Date:   Tue, 13 Apr 2021 18:19:33 +0200
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Julia Lawall <julia.lawall@...ia.fr>
Cc:     outreachy-kernel@...glegroups.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [Outreachy kernel] [PATCH] :staging: rtl8723bs: Remove useless led_blink_hdl()

On Tuesday, April 13, 2021 6:04:16 PM CEST Julia Lawall wrote:
> On Tue, 13 Apr 2021, Fabio M. De Francesco wrote:
> > Removed the led_blink_hdl() function (declaration, definition, and
> > caller code) because it's useless. It only seems to check whether or
> > not a given pointer is NULL. There are other (simpler) means for that
> > purpose.
> > 
> > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>
> > ---
> > 
> >  drivers/staging/rtl8723bs/core/rtw_cmd.c         | 1 -
> >  drivers/staging/rtl8723bs/core/rtw_mlme_ext.c    | 9 ---------
> >  drivers/staging/rtl8723bs/include/rtw_mlme_ext.h | 1 -
> >  3 files changed, 11 deletions(-)
> > 
> > diff --git a/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > b/drivers/staging/rtl8723bs/core/rtw_cmd.c index
> > 0297fbad7bce..4c44dfd21514 100644
> > --- a/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > +++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > @@ -150,7 +150,6 @@ static struct cmd_hdl wlancmds[] = {
> > 
> >  	GEN_MLME_EXT_HANDLER(0, h2c_msg_hdl) /*58*/
> >  	GEN_MLME_EXT_HANDLER(sizeof(struct SetChannelPlan_param),
> >  	set_chplan_hdl) /*59*/> 
> > -	GEN_MLME_EXT_HANDLER(sizeof(struct LedBlink_param), 
led_blink_hdl)
> > /*60*/
> This is worrisome.  Doyou fully understand the impact of this?  If not,
> the change is probably not a good idea.
>
This is that macro definition:

#define GEN_MLME_EXT_HANDLER(size, cmd) {size, cmd},

struct C2HEvent_Header {

#ifdef __LITTLE_ENDIAN

        unsigned int len:16;
        unsigned int ID:8;
        unsigned int seq:8;
#else
        unsigned int seq:8;
        unsigned int ID:8;
        unsigned int len:16;
#endif
        unsigned int rsvd;
};

It's a bit convoluted with regard to my experience. Probably I don't 
understand it fully, but it seems to me to not having effects to the code 
where I removed its use within core/rtw_cmd.c.

What am I missing?

Thanks for your kind help,

Fabio
> 
> julia
> 
> >  	GEN_MLME_EXT_HANDLER(sizeof(struct SetChannelSwitch_param),
> >  	set_csa_hdl) /*61*/ GEN_MLME_EXT_HANDLER(sizeof(struct
> >  	TDLSoption_param), tdls_hdl) /*62*/> 
> > diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> > b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c index
> > 440e22922106..6f2a0584f977 100644
> > --- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> > +++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
> > @@ -6189,15 +6189,6 @@ u8 set_chplan_hdl(struct adapter *padapter,
> > unsigned char *pbuf)> 
> >  	return	H2C_SUCCESS;
> >  
> >  }
> > 
> > -u8 led_blink_hdl(struct adapter *padapter, unsigned char *pbuf)
> > -{
> > -
> > -	if (!pbuf)
> > -		return H2C_PARAMETERS_ERROR;
> > -
> > -	return	H2C_SUCCESS;
> > -}
> > -
> > 
> >  u8 set_csa_hdl(struct adapter *padapter, unsigned char *pbuf)
> >  {
> >  
> >  	return	H2C_REJECTED;
> > 
> > diff --git a/drivers/staging/rtl8723bs/include/rtw_mlme_ext.h
> > b/drivers/staging/rtl8723bs/include/rtw_mlme_ext.h index
> > 5e6cf63956b8..472818c5fd83 100644
> > --- a/drivers/staging/rtl8723bs/include/rtw_mlme_ext.h
> > +++ b/drivers/staging/rtl8723bs/include/rtw_mlme_ext.h
> > @@ -745,7 +745,6 @@ u8 chk_bmc_sleepq_hdl(struct adapter *padapter,
> > unsigned char *pbuf);> 
> >  u8 tx_beacon_hdl(struct adapter *padapter, unsigned char *pbuf);
> >  u8 set_ch_hdl(struct adapter *padapter, u8 *pbuf);
> >  u8 set_chplan_hdl(struct adapter *padapter, unsigned char *pbuf);
> > 
> > -u8 led_blink_hdl(struct adapter *padapter, unsigned char *pbuf);
> > 
> >  u8 set_csa_hdl(struct adapter *padapter, unsigned char *pbuf);	
/*
> >  Kurt: Handling DFS channel switch announcement ie. */ u8
> >  tdls_hdl(struct adapter *padapter, unsigned char *pbuf);
> >  u8 run_in_thread_hdl(struct adapter *padapter, u8 *pbuf);
> > 
> > --
> > 2.31.1
> > 
> > --
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> > outreachy-kernel+unsubscribe@...glegroups.com. To view this discussion
> > on the web visit
> > https://groups.google.com/d/msgid/outreachy-kernel/20210413155908.8691
> > -1-fmdefrancesco%40gmail.com.