Cyclic DMA - callback properties and tx_status residue
shijie8 at gmail.com
Thu May 10 09:19:47 EDT 2012
On Thu, May 10, 2012 at 6:58 PM, Vinod Koul <vinod.koul at linux.intel.com> wrote:
> On Thu, 2012-05-10 at 08:44 +0100, Russell King - ARM Linux wrote:
>> In fact, please look at both imx-dma.c _and_ imx-sdma.c - search for
>> "callback" and have a look at the code around there.
>> You will find that imx-dma.c processes one descriptor per tasklet run,
>> and calls the callback under a spinlock.
>> You'll find that imx-sdma.c always calls callbacks from IRQ context.
> Yup, let me try to fix them!
I ever sent you a patch to fix it.
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