Viresh Kumar
2021-Jun-29 11:16 UTC
[PATCH v10] i2c: virtio: add a virtio i2c frontend driver
On 29-06-21, 13:11, Wolfram Sang wrote:> > > The case when ``length of \field{write_buf}''=0, and at the same time, > > ``length of \field{read_buf}''=0 is called not-a-read-write request > > and result for such a request is I2C device specific. > > Obviously, I don't know much about the specs and their wording. Still I > wonder if we can't call it a zero length transfer?Maybe that.> This is allowed by > the I2C standard and SMBus has even a proper name for it (SMBUS_QUICK). > From my point of view, I would not say it is device specific because > devices are expected to ACK such a message.Actually we should skip the last line from my diff, i.e. completely drop "and result for such a request is I2C device specific". The device (host in virtio spec terminology) still needs to return success/failure as it does for other requests. Nothing special here. -- viresh