linux-kernel - Re: [PATCH] dmatest: properly handle duplicate DMA channels

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Message-ID: <20080918173258.2640000b@hskinnemo-gx745.norway.atmel.com>
Date:	Thu, 18 Sep 2008 17:32:58 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	Timur Tabi <timur@...escale.com>
Cc:	dan.j.williams@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmatest: properly handle duplicate DMA channels

Timur Tabi <timur@...escale.com> wrote:
> Update the the dmatest driver so that it handles duplicate DMA channels
> properly.
> 
> When a DMA client is notified of an available DMA channel, it must check if it
> has already allocated resources for that channel.  If so, it should return
> DMA_DUP.  This can happen, for example, if a DMA driver calls
> dma_async_device_register() more than once.
> 
> Signed-off-by: Timur Tabi <timur@...escale.com>

Acked-by: Haavard Skinnemoen <haavard.skinnemoen@...el.com>

...though I don't really see why you have to use
list_for_entry_safe()...

Thanks a lot!

Haavard
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