[PATCH 3/4] fsl-dma: support attribute of DMA_MEMORY when async_tx enabled

[Dan Williams]

On Mon, Jul 9, 2012 at 10:59 PM, Qiang Liu <qiang.liu at freescale.com> wrote:
> - delete attribute of DMA_INTERRUPT because fsl-dma doesn't support
> this function, exception will be thrown if talitos is used to compute xor
> at the same time;
> - change the release process of dma descriptor for avoiding exception when
> enable config NET_DMA, release dma descriptor from 1st to last second, the
> last descriptor which is reserved in current descriptor register may not be
> completed, race condition will be raised if free current descriptor;
> - use spin_lock_bh to instead of spin_lock_irqsave for improving performance;
>
> A race condition which is raised when use both of talitos and dmaengine to
> offload xor is because napi scheduler will sync all pending requests in dma
> channels, it will affect the process of raid operations. The descriptor is
> freed which is submitted just now, but async_tx must check whether this depend
> tx descriptor is acked, there are poison contents in the invalid address,
> then BUG_ON() is thrown, so this descriptor will be freed in the next time.
>
> Cc: Dan Williams <dan.j.williams at intel.com>
> Cc: Vinod Koul <vinod.koul at intel.com>
> Cc: Li Yang <leoli at freescale.com>
> Signed-off-by: Qiang Liu <qiang.liu at freescale.com>
> ---

>From the description this sounds like 3 or 4 patches.  Can you split it up?