linux-kernel - Re: [RFC patch] DMAengine/Langwell: put tx descriptor in error path

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Date:	Mon, 08 Aug 2011 22:30:37 +0530
From:	"Koul, Vinod" <vinod.koul@...el.com>
To:	Hillf Danton <dhillf@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [RFC patch] DMAengine/Langwell: put tx descriptor in error path

On Tue, 2011-07-26 at 20:43 +0800, Hillf Danton wrote:
> When preparing LLI based periphral transfer, if error encountered, the newly
> prepared tx descriptor should be put for later recycling.
> 
> Signed-off-by: Hillf Danton <dhillf@...il.com>
> ---
>  drivers/dma/intel_mid_dma.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
> index f653517..b78a65a 100644
> --- a/drivers/dma/intel_mid_dma.c
> +++ b/drivers/dma/intel_mid_dma.c
> @@ -793,6 +793,7 @@ static struct dma_async_tx_descriptor
> *intel_mid_dma_prep_slave_sg(
>  				32, 0);
This looks like a corrupt patch, can you fix this
>  	if (NULL == desc->lli_pool) {
>  		pr_err("MID_DMA:LLI pool create failed\n");
> +		midc_desc_put(midc, desc);
>  		return NULL;
>  	}
> 
> @@ -800,6 +801,7 @@ static struct dma_async_tx_descriptor
> *intel_mid_dma_prep_slave_sg(
>  	if (!desc->lli) {
>  		pr_err("MID_DMA: LLI alloc failed\n");
>  		pci_pool_destroy(desc->lli_pool);
> +		midc_desc_put(midc, desc);
>  		return NULL;
>  	}
> --
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-- 
~Vinod

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