netdev - Re: [Linux-zigbee-devel] [PATCH] mac802154: Keep track of the channel when changed

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Date:	Fri, 05 Apr 2013 17:20:23 -0400
From:	Alan Ott <alan@...nal11.us>
To:	Werner Almesberger <werner@...esberger.net>
CC:	Alexander Smirnov <alex.bluesman.smirnov@...il.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-zigbee-devel@...ts.sourceforge.net
Subject: Re: [Linux-zigbee-devel] [PATCH] mac802154: Keep track of the channel
 when changed

On 04/05/2013 05:05 PM, Werner Almesberger wrote:
> Alan Ott wrote:
>> Prevent set_channel() from getting called every time a packet is sent. This
>> looks like it was an oversight.
> at86rf230.c and derivatives avoid this problem by setting
> phy->current_* in the *_channel function.
>
> But I'd agree that it's nicer to do this in one place, not in
> every driver.
>
> In case a driver had a weird failure mode in which it leaves the
> original channel but only makes it halfway to the new channel, it
> could still set phy->current_* and return an error. So there's no
> loss of functionality with your change.

Hmm... I just noticed that mib.c does the same thing (and doesn't set
phy->current_*). I'll need to fix that one too (and resubmit). :(

Alan.



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