linux-kernel - Re: [PATCH] dmaengine: pl330: dont complete descriptor for cyclic dma

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Message-ID: <1339056822.1927.8.camel@vkoul-udesk3>
Date:	Thu, 07 Jun 2012 13:43:42 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	Tushar Behera <tushar.behera@...aro.org>
Cc:	linux-kernel@...r.kernel.org, dan.j.williams@...el.com,
	patches@...aro.org, stable <stable@...r.kernel.org>
Subject: Re: [PATCH] dmaengine: pl330: dont complete descriptor for cyclic
 dma

On Wed, 2012-05-23 at 16:47 +0530, Tushar Behera wrote:
> Commit eab215855803 ("dmaengine: pl330: dont complete descriptor for
> cyclic dma") wrongly completes descriptor for cyclic dma, hence following
> BUG_ON is still hit with cyclic DMA operations.
> 
> kernel BUG at drivers/dma/dmaengine.h:53!
> 
> Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
> ---
>  drivers/dma/pl330.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index fa3fb21..8c44f17 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2322,7 +2322,7 @@ static void pl330_tasklet(unsigned long data)
>  	/* Pick up ripe tomatoes */
>  	list_for_each_entry_safe(desc, _dt, &pch->work_list, node)
>  		if (desc->status == DONE) {
> -			if (pch->cyclic)
> +			if (!pch->cyclic)
>  				dma_cookie_complete(&desc->txd);
>  			list_move_tail(&desc->node, &list);
>  		}
Applied thanks. I have cc'ed stable.

-- 
~Vinod

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