linux-kernel - Re: [PATCH (net.git) 2/3] stmmac: fix PTP support for GMAC4

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Message-ID: <CAJ3bTp4ScTGFKFK+uAFo7ML-yPZLP=hxBCHqxJEnqKzwzVNnqw@mail.gmail.com>
Date:   Wed, 2 Nov 2016 12:34:19 +0530
From:   Rayagond Kokatanur <rayagond@...avyalabs.com>
To:     Giuseppe CAVALLARO <peppe.cavallaro@...com>
Cc:     netdev <netdev@...r.kernel.org>, alexandre.torgue@...com,
        Richard Cochran <richardcochran@...il.com>,
        linux-kernel@...r.kernel.org,
        Seraphin Bonnaffe <seraphin.bonnaffe@...com>
Subject: Re: [PATCH (net.git) 2/3] stmmac: fix PTP support for GMAC4

On Wed, Nov 2, 2016 at 12:04 PM, Giuseppe CAVALLARO
<peppe.cavallaro@...com> wrote:
> Hello Rayagond
>
> if patches are ok, can we consider you Acked-by ?
Yes.

>
> Thx
> Peppe
>
>
> On 10/27/2016 12:51 PM, Rayagond Kokatanur wrote:
>>
>> On Thu, Oct 27, 2016 at 4:02 PM, Giuseppe CAVALLARO
>> <peppe.cavallaro@...com> wrote:
>>>
>>> Hello Rayagond !
>>>
>>> On 10/27/2016 12:25 PM, Rayagond Kokatanur wrote:
>>>>>
>>>>>
>>>>> +static int dwmac4_wrback_get_rx_timestamp_status(void *desc, u32 ats)
>>>>>>
>>>>>>  {
>>>>>>         struct dma_desc *p = (struct dma_desc *)desc;
>>>>>> +       int ret = -EINVAL;
>>>>>> +
>>>>>> +       /* Get the status from normal w/b descriptor */
>>>>>> +       if (likely(p->des3 & TDES3_RS1V)) {
>>>>>> +               if (likely(p->des1 & RDES1_TIMESTAMP_AVAILABLE)) {
>>>>>> +                       int i = 0;
>>>>>> +
>>>>>> +                       /* Check if timestamp is OK from context
>>>>>> descriptor */
>>>>>> +                       do {
>>>>>> +                               ret = dwmac4_rx_check_timestamp(desc);
>>>>
>>>>
>>>> Here, "desc" is not pointing to next descriptor (ie context
>>>> descriptor). Driver should check the context descriptor.
>>>
>>>
>>>
>>> you are right and this is done by the caller:  stmmac_get_rx_hwtstamp
>>
>>
>> Yes.
>>
>>>
>>> Cheers
>>> peppe
>>>
>>
>>
>>
>



-- 
wwr
Rayagond