linux-kernel - Re: [PATCH] dma: fix vchan_cookie

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Date:	Mon, 20 Jan 2014 15:29:17 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Jonas Jensen <jonas.jensen@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	arm@...nel.org, dan.j.williams@...el.com
Subject: Re: [PATCH] dma: fix vchan_cookie_complete() debug print

On Fri, Dec 06, 2013 at 04:42:09PM +0100, Jonas Jensen wrote:
> vd->tx.cookie is set zero on dma_cookie_complete(),
> save to local before printing it.
> 
> Signed-off-by: Jonas Jensen <jonas.jensen@...il.com>
> ---
> 
> Notes:
>     dev_vdbg() could also be moved to happen earlier, what do you prefer?
This would be preferred IMHO. Also pls cc dmaengine@...r on this

--
~Vinod
>     
>     Applies to next-20131206
> 
>  drivers/dma/virt-dma.h | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
> index 85c19d6..181b9526 100644
> --- a/drivers/dma/virt-dma.h
> +++ b/drivers/dma/virt-dma.h
> @@ -84,10 +84,12 @@ static inline bool vchan_issue_pending(struct virt_dma_chan *vc)
>  static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
>  {
>  	struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
> +	dma_cookie_t cookie;
>  
> +	cookie = vd->tx.cookie;
>  	dma_cookie_complete(&vd->tx);
>  	dev_vdbg(vc->chan.device->dev, "txd %p[%x]: marked complete\n",
> -		vd, vd->tx.cookie);
> +		 vd, cookie);
>  	list_add_tail(&vd->node, &vc->desc_completed);
>  
>  	tasklet_schedule(&vc->task);
> -- 
> 1.8.2.1
> 

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