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Subject: Re: [virtio-dev] Re: [PATCH V5 2/2] virtio: i2c: Allow zero-length transactions

On 2021/10/12 22:09, Arnd Bergmann wrote:

@@ -124,13 +140,23 @@ \subsubsection{Device Operation: Operation Status}\label{sec:Device Types / I2C

  \drivernormative{\subsubsection}{Device Operation}{Device Types / I2C Adapter Device / Device Operation}

+A driver SHOULD implement the VIRTIO_I2C_F_ZERO_LENGTH_REQUEST feature.
I don't think this needs to be "SHOULD", as a driver may be written to only
talk to certain i2c clients on the device side, and they do not need zero
length requests. Maybe this could be

"A driver MAY assume that the VIRTIO_I2C_F_ZERO_LENGTH_REQUEST
feature is available".

Agree. "MAY" is better.

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