i2c_transfer & dma

["Peter Hüwe" <PeterHuewe-Mmb7MZpHnFY@public.gmane.org>]

Hi,

I was wondering if the buffer in an i2c_msg, passed to i2c_transfer must be 
dma-able i.e. dynamically allocated, like for USB?

The reason why I'm asking is because the e.g. the i2c_robotfuzz_osif usb-to-
i2c adapter passes the incoming data directly to a usb_control_msg which of 
course expects the buffer to be dma-able.

So the question is - does the user of i2c_transfer have to provide a dma-able 
buffer, or is the bus driver (like the robotfuzz one) expected to convert 
incoming buffer into a dma-able buffer?


Thanks,
Peter