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

[Michael Straube]

On 06/22/18 12:57, Dan Carpenter wrote:
> 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.

So it should be this?

        if (((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) &&
             (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)) &&
            (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac))) {
                addr = of_get_property(np, "local-mac-address", &len);
                if (addr && len == ETH_ALEN) {
                        memcpy(mac_addr, addr, ETH_ALEN);
                } else {
                        mac[0] = 0x00;
                        ...
		}
	}

If yes, I'm not sure how to proceed as these are the very first patches I send.
Should I send a v2 patch with both changes or just a v2 with "np" removed and
another one for adding 'is_broadcast_ether_addr' and 'is_zero_ether_addr' checks?

Regards,
Michael