linux-kernel - Re: [Outreachy kernel] [PATCH v2] staging: rtl8723bs: Remove useless led_blink

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Date:   Wed, 14 Apr 2021 20:48:09 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>,
        outreachy-kernel@...glegroups.com, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Julia Lawall <julia.lawall@...ia.fr>
Subject: Re: [Outreachy kernel] [PATCH v2] staging: rtl8723bs: Remove useless
 led_blink_hdl()

On Wed, Apr 14, 2021 at 07:00:41PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Apr 14, 2021 at 06:26:14PM +0200, Fabio M. De Francesco wrote:
> > Removed useless led_blink_hdl() prototype and definition. In wlancmds[]
> > the slot #60 is now set to NULL using the macro GEN_MLME_EXT_HANDLER. This
> > change has not unwanted side effects because the code in rtw_cmd.c checks
> > if the function pointer is valid before using it.
> > 
> > Reported-by: Julia Lawall <julia.lawall@...ia.fr>
> > Suggested-by: Dan Carpenter <dan.carpenter@...cle.com>
> > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@...il.com>
> > ---
> > 
> > Changes since v1: Corrected a bad solution to this issue that made use of
> > an unnecessary dummy function.
> > 
> >  drivers/staging/rtl8723bs/core/rtw_cmd.c         | 2 +-
> >  drivers/staging/rtl8723bs/core/rtw_mlme_ext.c    | 9 ---------
> >  drivers/staging/rtl8723bs/include/rtw_mlme_ext.h | 1 -
> >  3 files changed, 1 insertion(+), 11 deletions(-)
> > 
> > diff --git a/drivers/staging/rtl8723bs/core/rtw_cmd.c b/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > index 0297fbad7bce..f82dbd4f4c3d 100644
> > --- a/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > +++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c
> > @@ -150,7 +150,7 @@ 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*/
> > +	GEN_MLME_EXT_HANDLER(0, NULL) /*60*/
> 
> Better, but you really do not need to keep this here, right?  Remove the
> "led blink command" entirely, you didn't do that here.

No, this is right.  We have to put a NULL function pointer in the array
or the indexing will be off.  But Fabio is correct that the struct
type should be removed.

regards,
dan carpenter