linux-kernel - Re: [PATCH 05/11] firewire: cdev: add ioctls for isochronous resource management

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Message-Id: <1231705949.3538.78.camel@localhost.localdomain>
Date:	Sun, 11 Jan 2009 12:32:29 -0800
From:	David Moore <dcm@....EDU>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/11] firewire: cdev: add ioctls for isochronous
 resource management

On Sun, 2009-01-04 at 16:26 +0100, Stefan Richter wrote:
> Based on
>     Date: Tue, 18 Nov 2008 11:41:27 -0500
>     From: Jay Fenlason <fenlason@...hat.com>
>     Subject: [Patch V4] Add ISO resource management support
> with several changes to the ABI and implementation.  Only the part of
> the ABI which enables auto-reallocation and auto-deallocation is
> included here.
> 
> This implements ioctls for kernel-assisted allocation of isochronous
> channels and isochronous bandwidth.  The benefits are:
>   - The client does not have to have write access to the /dev/fw* device
>     corresponding to the IRM.
>   - The client does not have to perform reallocation after bus resets.
>   - Channel and bandwidth are deallocated by the kernel if the file is
>     closed before the client deallocated the resources.  Thus resources
>     are released even if the client crashes.
> 
> It is anticipated that future in-kernel code (firewire-core IRM code;
> the firewire port of firedtv), will use the fw-iso.c portions of this
> code too.
> 
> Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>

Tested-by: David Moore <dcm@....org>

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