Re: [PATCH v3 6/8] DMA: Freescale: change descriptor release process for supporting async_tx

2014-04-14 Thread Andy Shevchenko
On Fri, 2014-04-11 at 16:33 +0800, Hongbo Zhang wrote: > >>> + * hardware channel, subsequent descriptors are either in > >>> + * process or have not been submitted > >> Dot at the eol. Check in all comments. > > > > Even though I saw there are other comments without the dots, I th

Re: [PATCH v3 6/8] DMA: Freescale: change descriptor release process for supporting async_tx

2014-04-11 Thread Hongbo Zhang
On 04/11/2014 04:00 PM, Hongbo Zhang wrote: On 04/10/2014 07:56 PM, Andy Shevchenko wrote: On Thu, 2014-04-10 at 15:10 +0800, hongbo.zh...@freescale.com wrote: From: Hongbo Zhang Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is lack of support in current release

Re: [PATCH v3 6/8] DMA: Freescale: change descriptor release process for supporting async_tx

2014-04-11 Thread Hongbo Zhang
On 04/10/2014 07:56 PM, Andy Shevchenko wrote: On Thu, 2014-04-10 at 15:10 +0800, hongbo.zh...@freescale.com wrote: From: Hongbo Zhang Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is lack of support in current release process of dma descriptor, all descriptors will

Re: [PATCH v3 6/8] DMA: Freescale: change descriptor release process for supporting async_tx

2014-04-10 Thread Andy Shevchenko
On Thu, 2014-04-10 at 15:10 +0800, hongbo.zh...@freescale.com wrote: > From: Hongbo Zhang > > Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is > lack of support in current release process of dma descriptor, all descriptors > will be released whatever is acked or no-acke

[PATCH v3 6/8] DMA: Freescale: change descriptor release process for supporting async_tx

2014-04-10 Thread hongbo.zhang
From: Hongbo Zhang Fix the potential risk when enable config NET_DMA and ASYNC_TX. Async_tx is lack of support in current release process of dma descriptor, all descriptors will be released whatever is acked or no-acked by async_tx, so there is a potential race condition when dma engine is uesd b