linux-kernel - Re: [PATCH 14/32] dmaengine: ste_dma40: Remove 'always true' checking

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Date:	Mon, 22 Apr 2013 15:14:32 +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,
	arnd@...db.de, linus.walleij@...ricsson.com,
	Dan Williams <djbw@...com>,
	Per Forlin <per.forlin@...ricsson.com>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH 14/32] dmaengine: ste_dma40: Remove 'always true'
 checking

On Thu, Apr 18, 2013 at 11:11:56AM +0100, Lee Jones wrote:
> Before allocating memory for logical channels, the current driver
> checks to see if there are any. Well as the dma40_memcpy_channels[]
> array is always populated, the check is always true. Best to
> remove the check.
> 
> 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>
Acked-by: Vinod Koul <vnod.koul@...el.com>

The init should be updated to use devm_ versions..

--
~Vinod
> ---
>  drivers/dma/ste_dma40.c |   16 +++++-----------
>  1 file changed, 5 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
> index a39ef74..ec0d6ab 100644
> --- a/drivers/dma/ste_dma40.c
> +++ b/drivers/dma/ste_dma40.c
> @@ -3273,17 +3273,11 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
>  	if (!base->lookup_phy_chans)
>  		goto failure;
>  
> -	if (num_log_chans + ARRAY_SIZE(dma40_memcpy_channels)) {
> -		/*
> -		 * The max number of logical channels are event lines for all
> -		 * src devices and dst devices
> -		 */
> -		base->lookup_log_chans = kzalloc(num_log_chans *
> -						 sizeof(struct d40_chan *),
> -						 GFP_KERNEL);
> -		if (!base->lookup_log_chans)
> -			goto failure;
> -	}
> +	base->lookup_log_chans = kzalloc(num_log_chans *
> +					 sizeof(struct d40_chan *),
> +					 GFP_KERNEL);
> +	if (!base->lookup_log_chans)
> +		goto failure;
>  
>  	base->reg_val_backup_chan = kmalloc(base->num_phy_chans *
>  					    sizeof(d40_backup_regs_chan),
> -- 
> 1.7.10.4
> 
--
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