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Re: [PATCH 4/7] k3dma: Add cyclic mode for audio

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  Re: [PATCH 4/7] k3dma: Add cyclic mode for audio John Stultz <john.stultz@linaro.org> - 2016-07-30 00:40 +0200

#1452603 — Re: [PATCH 4/7] k3dma: Add cyclic mode for audio

On Sun, Jul 24, 2016 at 12:31 AM, Vinod Koul <vinod.koul@intel.com> wrote:
> On Wed, Jul 20, 2016 at 08:53:06PM -0700, John Stultz wrote:
>
>>       ds = kzalloc(sizeof(*ds) + num * sizeof(ds->desc_hw[0]), GFP_ATOMIC);
>> -     if (!ds) {
>> -             dev_dbg(chan->device->dev, "vchan %p: kzalloc fail\n", &c->vc);
>> +     if (!ds)
>
> This is an unrelated change

Ack. And Its fallen out with recent changes in 4.8-rc


>> +
>> +     ds = kzalloc(sizeof(*ds) + num * sizeof(ds->desc_hw[0]), GFP_ATOMIC);
>
> we should use GFP_NOWAIT. And looks like driver doesn't use GFP_NOWAIT< so
> you may fix that up as well

Done.

>> +     if (!ds)
>> +             return NULL;
>> +
>> +     ds->desc_hw_lli = __virt_to_phys((unsigned long)&ds->desc_hw[0]);
>
> why no dma_map_single(()?
>
> Also __api is internal APIs, driver should not use them. Why not plain
> virt_to_phys()

Right. This is reworked by one of the following patches, but I
reordered things in my tree so those fixes land before we add the
cyclic feature.

I'll resend after the merge-window is over (unless you'd like to see it sooner).

thanks
-john

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