netdev - Re: [PATCH net-next 2/8] bridge: Keep track of ports capable of automatic discovery.

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Message-ID: <20140514084251.317ed026@nehalam.linuxnetplumber.net>
Date:	Wed, 14 May 2014 08:42:51 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Vlad Yasevich <vyasevic@...hat.com>
Cc:	netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
	shemminger@...tta.com, mst@...hat.com, john.r.fastabend@...el.com,
	jhs@...atatu.com
Subject: Re: [PATCH net-next 2/8] bridge: Keep track of ports capable of
 automatic discovery.

On Wed, 14 May 2014 11:09:22 -0400
Vlad Yasevich <vyasevic@...hat.com> wrote:

> @@ -58,6 +61,7 @@ static int store_flag(struct net_bridge_port *p, unsigned long v,
>  
>  	if (flags != p->flags) {
>  		p->flags = flags;
> +		br_port_flags_change(p, old_flags ^ flags);

You are also xoring twice.

Why not:

store_flag()
	if (flags != p->flags) {
		br_port_flags_change(p, flags);
		p->flags = flags;
		br_ifinfo_notify(RTM_NEWLINK, p);
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