linux-kernel - Re: [PATCH] staging: brcm80211: return false if not a broadcom board

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Date:	Fri, 17 Jun 2011 15:01:08 -0700
From:	"Henry Ptasinski" <henryp@...adcom.com>
To:	"Julian Calaby" <julian.calaby@...il.com>
cc:	"Greg Dietsche" <gregory.dietsche@....edu>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"Brett Rudley" <brudley@...adcom.com>,
	"Dowan Kim" <dowan@...adcom.com>,
	"Roland Vossen" <rvossen@...adcom.com>,
	"Arend Van Spriel" <arend@...adcom.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Henry Ptasinski" <henryp@...adcom.com>
Subject: Re: [PATCH] staging: brcm80211: return false if not a broadcom
 board

On Thu, Jun 16, 2011 at 04:45:21PM -0700, Julian Calaby wrote:
> Henry,
> 
> On Fri, Jun 17, 2011 at 09:37, Henry Ptasinski <henryp@...adcom.com> wrote:
> > How's this for a somewhat clearer implementation:
> >
> > static bool brcms_c_validboardtype(struct brcms_c_hw_info *wlc_hw)
> > {
> >        bool goodboard = true;
> >        uint boardrev = wlc_hw->boardrev;
> >
> >        if (wlc_hw->sih->boardvendor == PCI_VENDOR_ID_BROADCOM) {
> 
> You could reduce indentation by having this be:
> 
> if (wlc_hw->sih->boardvendor != PCI_VENDOR_ID_BROADCOM)
>     return true;
> 
> >                /* validate boardrev */
> >                if (boardrev == 0)
> >                        goodboard = false;
> 
> and remove the goodboard variable by having this return false immediately.
> 
> >                else if (boardrev > 0xff) {
> 
> You could also drop the else and have this as
> 
> if (boardrev <= 0xff)
>     return true;
> 
> >                        /* 4 bits each for board type, major, minor, and tiny
> >                        version numbers */
> >                        uint brt = (boardrev & 0xf000) >> 12;
> >                        uint b0 = (boardrev & 0xf00) >> 8;
> >                        uint b1 = (boardrev & 0xf0) >> 4;
> >                        uint b2 = boardrev & 0xf;
> >
> >                        if ((brt > 2) || (brt == 0) || (b0 > 9) || (b0 == 0)
> >                                || (b1 > 9) || (b2 > 9))
> >                                goodboard = false;
> 
> and return false here too.
> 
> >                }
> >        }
> >
> >        return goodboard;
> 
> then just return true here.
> 
> > }
> 
> Thanks,
> 
> -- 
> Julian Calaby

Yea, it's a lot flatter with those changes.  Look for it in a patch set
relatively soon ...

- Henry


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