linux-kernel - RE: [PATCH] DMA: PL330: return ENOMEM instead of 0 from pl330_alloc_chan

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Date:	Mon, 17 Sep 2012 20:01:01 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	'Inderpal Singh' <inderpal.singh@...aro.org>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	vinod.koul@...el.com, patches@...aro.org, boojin.kim@...sung.com,
	jassisinghbrar@...il.com
Subject: RE: [PATCH] DMA: PL330: return ENOMEM instead of 0 from
 pl330_alloc_chan_resources

Inderpal Singh wrote:
> 
> Since 0 is not considered as error at dmaengine level, return ENOMEM
> from pl330_alloc_chan_resources in case of failure.
> 
> Signed-off-by: Inderpal Singh <inderpal.singh@...aro.org>

Acked-by: Kukjin Kim <kgene.kim@...sung.com>

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@...sung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.

> ---
>  drivers/dma/pl330.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index e4feba6..14d881c 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2393,7 +2393,7 @@ static int pl330_alloc_chan_resources(struct
> dma_chan *chan)
>  	pch->pl330_chid = pl330_request_channel(&pdmac->pif);
>  	if (!pch->pl330_chid) {
>  		spin_unlock_irqrestore(&pch->lock, flags);
> -		return 0;
> +		return -ENOMEM;
>  	}
> 
>  	tasklet_init(&pch->task, pl330_tasklet, (unsigned long) pch);
> --
> 1.7.9.5

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