linux-kernel - Re: [PATCH 35/39] dmaengine: ste_dma40_ll: Replace meaningless register set with comment

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Message-ID: <20130516051820.GH27639@intel.com>
Date:	Thu, 16 May 2013 10:48:20 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	balbi@...com, linux-usb@...r.kernel.org,
	linux-crypto@...r.kernel.org, davem@...emloft.net,
	herbert@...dor.hengli.com.au, arnd@...db.de,
	linus.walleij@...ricsson.com, srinidhi.kasagar@...ricsson.com,
	Dan Williams <djbw@...com>,
	Per Forlin <per.forlin@...ricsson.com>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH 35/39] dmaengine: ste_dma40_ll: Replace meaningless
 register set with comment

On Wed, May 15, 2013 at 10:51:58AM +0100, Lee Jones wrote:
> Unsure of the author's intentions, rather than just removing the nop,
> we're replacing it with a comment containing the possible intention
> of the statement OR:ing with 0.
Would be worthwhile to check w/ Linus W on this (or check whom to blame)

--
~Vinod
> 
> Cc: Vinod Koul <vinod.koul@...el.com>
> Cc: Dan Williams <djbw@...com>
> Cc: Per Forlin <per.forlin@...ricsson.com>
> Cc: Rabin Vincent <rabin@....in>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/dma/ste_dma40_ll.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
> index a035dfe..27b818d 100644
> --- a/drivers/dma/ste_dma40_ll.c
> +++ b/drivers/dma/ste_dma40_ll.c
> @@ -182,8 +182,10 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli,
>  	else
>  		lli->reg_cfg &= ~BIT(D40_SREG_CFG_TIM_POS);
>  
> -	/* Post link */
> -	lli->reg_lnk |= 0 << D40_SREG_LNK_PHY_PRE_POS;
> +	/*
> +	 * Post link - D40_SREG_LNK_PHY_PRE_POS = 0
> +	 * Relink happens after transfer completion.
> +	 */
>  
>  	return 0;
>  }
> -- 
> 1.7.10.4
> 
--
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