> > You are not emulating I2C_FUNC_SMBUS_QUICK, so you need to mask it out.
> 
> What is it that we need to have to emulate it ? I did use it in my
> qemu and rust backends, not sure if this was ever sent by device I
> used for testing SMBUS though.

The biggest use is to scan busses for devices, i.e. use 'i2cdetect'
without the -r parameter.