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Date:   Wed, 20 Apr 2022 05:54:39 -0700
From:   Richard Cochran <>
To:     Tan Tee Min <>
Cc:     Jakub Kicinski <>,
        Tan Tee Min <>,
        Giuseppe Cavallaro <>,
        Alexandre Torgue <>,
        Jose Abreu <>,
        "David S . Miller" <>,
        Paolo Abeni <>,
        Maxime Coquelin <>,
        Rayagond Kokatanur <>,,,,,, Voon Wei Feng <>,
        Wong Vee Khee <>,
        Song Yoong Siang <>,
        Alexandre Torgue <>
Subject: Re: [PATCH net 1/1] net: stmmac: add fsleep() in HW Rx timestamp
 checking loop

On Wed, Apr 20, 2022 at 01:15:08PM +0800, Tan Tee Min wrote:
> No. The context descriptor (frame) is possibly still owned by the
> DMA controller in this situation.

So that is a problem.  The solution is to postpone this logic until
the driver owns the buffer.  Doesn't the HW offer some means of
notification, like an interrupt for example?


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