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

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Date:   Wed, 2 Nov 2016 07:34:01 +0100
From:   Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:     Rayagond Kokatanur <rayagond@...avyalabs.com>
CC:     netdev <netdev@...r.kernel.org>, <alexandre.torgue@...com>,
        Richard Cochran <richardcochran@...il.com>,
        <linux-kernel@...r.kernel.org>, <seraphin.bonnaffe@...com>
Subject: Re: [PATCH (net.git) 2/3] stmmac: fix PTP support for GMAC4

Hello Rayagond

if patches are ok, can we consider you Acked-by ?

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
>>
>
>
>