Re: [PATCH v9 1/3] dmaengine: ptdma: Initial driver for the AMD PTDMA

Sanjay R Mehta
2021-06-16T04:55:10Z

On 6/16/2021 9:45 AM, Vinod Koul wrote:
> [CAUTION: External Email]
>
> On 15-06-21, 16:50, Sanjay R Mehta wrote:
>
>>>> +static struct pt_device *pt_alloc_struct(struct device *dev)
>>>> +{
>>>> + struct pt_device *pt;
>>>> +
>>>> + pt = devm_kzalloc(dev, sizeof(*pt), GFP_KERNEL);
>>>> +
>>>> + if (!pt)
>>>> + return NULL;
>>>> + pt->dev = dev;
>>>> + pt->ord = atomic_inc_return(&pt_ordinal);
>>>
>>> What is the use of this number?
>>>
>>
>> There are eight similar instances of this DMA engine on AMD SOC.
>> It is to differentiate each of these instances.
>
> Are they individual device objects?
>

Yes, they are individual device objects.

> --
> ~Vinod
>