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Subject: [PATCH V5 0/2] virtio: i2c: Allow zero-length transactions


Arnd suggested (over IRC) to split this into two patches for better readability
and so here is a resend. The eventual specification hasn't changed at all.

- Split into two patches.

- Add a new mandatory feature flag.

- Add conformance clauses that require that the flag is consistent with the

- Name the buffer-less request as zero-length request.


I did try to follow the discussion you guys had during V4, where we added
support for multiple buffers for the same request, which I think is unnecessary
now, after introduction of the VIRTIO_I2C_FLAGS_FAIL_NEXT flag.


And so starting this discussion again, because we need to support stuff
like: i2cdetect -q <i2c-bus-number>, which issues a zero-length SMBus
Quick command.

Viresh Kumar (2):
  virtio: i2c: No need to have separate read-write buffers
  virtio: i2c: Allow zero-length transactions

 virtio-i2c.tex | 76 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 45 insertions(+), 31 deletions(-)


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