linux-kernel - Re: [PATCH] DMA: OMAP: Remove extra looping from omap_request

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Message-ID: <20110701071942.GC23145@atomide.com>
Date:	Fri, 1 Jul 2011 00:19:42 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Scott Ellis <scott@...pnowtek.com>
Cc:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH] DMA: OMAP: Remove extra looping from omap_request_dma

* Scott Ellis <scott@...pnowtek.com> [110629 20:58]:
> Break from dma channel search when a free one is found.

Care to describe how the current code is not finding a
free channel currently?

Tony

 
> Signed-off-by: Scott Ellis <scott@...pnowtek.com>
> ---
>  arch/arm/plat-omap/dma.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
> index c22217c..3d36fcf 100644
> --- a/arch/arm/plat-omap/dma.c
> +++ b/arch/arm/plat-omap/dma.c
> @@ -678,10 +678,9 @@ int omap_request_dma(int dev_id, const char *dev_name,
>  
>  	spin_lock_irqsave(&dma_chan_lock, flags);
>  	for (ch = 0; ch < dma_chan_count; ch++) {
> -		if (free_ch == -1 && dma_chan[ch].dev_id == -1) {
> +		if (dma_chan[ch].dev_id == -1) {
>  			free_ch = ch;
> -			if (dev_id == 0)
> -				break;
> +			break;
>  		}
>  	}
>  	if (free_ch == -1) {
> 
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