linux-kernel - Dead code in Starfire driver (set_vlan

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Date:	Thu, 28 Jul 2011 22:35:40 +0200 (CEST)
From:	Jesper Juhl <jj@...osbits.net>
To:	linux-kernel@...r.kernel.org
cc:	netdev@...r.kernel.org, Alexey Dobriyan <adobriyan@...il.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Akinobu Mita <akinobu.mita@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Ion Badulescu <ionut@...ula.org>, becker@...ld.com
Subject: Dead code in Starfire driver (set_vlan_mode())

In drivers/net/starfire.c::set_vlan_mode() there is this code:

...
	if (vlan_count == 32) {
		ret |= PerfectFilterVlan;
		while (vlan_count < 32) {
...

We've just tested 'vlan_count' as being equal to '32', so it's a bit silly 
to follow that up with a loop that's conditioned on the variable being 
less than that - it will never execute.

Now I don't know this code at all, so I have no idea what the proper fix 
is (just remove the loop? change the loop condition? something else?), but 
I do know that the current code makes little sense ;-)

Just for your information.

-- 
Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
Don't top-post http://www.catb.org/jargon/html/T/top-post.html
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