linux-kernel - Re: [PATCH 7/9] RapidIO: Add handling for PW message from a lost device

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Date:	Mon, 16 Aug 2010 14:29:37 +0200
From:	Micha Nelissen <micha@...i.hopto.org>
To:	Alexandre Bounine <alexandre.bounine@....com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH 7/9] RapidIO: Add handling for PW message from a lost
 device

Alexandre Bounine wrote:
> Add check if PW message source device is accessible and change PW message
> handler to recover if PW message source device is not available anymore (power
> down or link disconnect).

I am not quite sure what the point is of this patch. What do you need to 
recover from?

> To avoid possible loss of notification, the PW message handler scans the route
> back from the source device to identify end of the broken link.

Do you mean if port-writes are dropped? Then they did not reach you in 
the first place. If a link in between is broken, the associated switch 
will 'complain' and send port-writes, no?

Micha
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