> what we need is only i2c_xfers->buf to be DMA-safe, not the *i2c_xfers.
> Right ?

Yes.

> Also I guess same change is required for all the vendor drivers. But Not
> sure if it's feasible with this patch ?

I also wondered if the I3C core should maybe provide this, but then I
saw that currently only the mipi-hci driver uses DMA and concluded that
per-driver is better. At least for now.