linux-kernel - Re: [PATCH] staging: rtl8723bs: do not use assignment in if condition

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Message-ID: <20180622105719.pt3lh6fqi2nziqsz@mwanda>
Date:   Fri, 22 Jun 2018 13:57:19 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Michael Straube <michael.straube@...teo.de>,
        gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723bs: do not use assignment in if condition

On Fri, Jun 22, 2018 at 03:54:22AM -0700, Joe Perches wrote:
> On Fri, 2018-06-22 at 13:40 +0300, Dan Carpenter wrote:
> > On Thu, Jun 21, 2018 at 08:22:30PM +0200, Michael Straube wrote:
> > > Fix checkpatch error 'do not use assignment in if condition'.
> []
> > > diff --git a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
> > > index e55895632921..87a4ced41028 100644
> > > --- a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
> > > +++ b/ 
> > > @@ -1181,9 +1181,8 @@ void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr)
> > >  	     (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff)) ||
> > >  	    ((mac[0] == 0x00) && (mac[1] == 0x00) && (mac[2] == 0x00) &&
> > >  	     (mac[3] == 0x00) && (mac[4] == 0x00) && (mac[5] == 0x00))) {
> 
> Should also use is_broadcast_ether_addr and is_zero_ether_addr
> 
> > > -		if (np &&
> > > -		    (addr = of_get_property(np, "local-mac-address", &len)) &&
> > > -		    len == ETH_ALEN) {
> > > +		addr = of_get_property(np, "local-mac-address", &len);
> > > +		if (np && addr && len == ETH_ALEN) {
> > 
> > You can remove the "np" check.
> > 
> > 		if (addr && len == ETH_ALEN) {
> 
> It looks more like the rewrite is incorrect
> as np is tested before of_get_property
> 

That's what I was worried about too, but if "np" is NULL then
of_get_property() just returns NULL so it's fine.

regards,
dan carpenter

regards,
dan carpenter