linux-kernel - Re: [PATCH] dmaengine: at_hdmac: remove unused function

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Date:	Thu, 28 Nov 2013 11:31:49 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Olof Johansson <olof@...om.net>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	dmaengine@...r.kernel.org, nicolas.ferre@...el.com,
	linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH] dmaengine: at_hdmac: remove unused function

On Tue, Nov 26, 2013 at 10:43:35AM -0800, Olof Johansson wrote:
> commit 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
> refactored some code which resulted in an unused function in the at_hdmac
> driver:
> 
> drivers/dma/at_hdmac_regs.h:350:23: warning: 'chan2parent' defined but
>     not used [-Wunused-function]
> 
> Fixes: 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
> Signed-off-by: Olof Johansson <olof@...om.net>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Acked-by: Vinod Koul <vinod.koul@...el.com>

> ---
> 
> Dan,
> 
> Looks like you fixed up the DesignWare driver for the same issue but
> this needs it to.
> 
>  drivers/dma/at_hdmac_regs.h | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h
> index f31d647acdfa..2787aba60c6b 100644
> --- a/drivers/dma/at_hdmac_regs.h
> +++ b/drivers/dma/at_hdmac_regs.h
> @@ -347,10 +347,6 @@ static struct device *chan2dev(struct dma_chan *chan)
>  {
>  	return &chan->dev->device;
>  }
> -static struct device *chan2parent(struct dma_chan *chan)
> -{
> -	return chan->dev->device.parent;
> -}
>  
>  #if defined(VERBOSE_DEBUG)
>  static void vdbg_dump_regs(struct at_dma_chan *atchan)
> -- 
> 1.8.4.1.601.g02b3b1d
> 
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