> > They are probably SMBus calls but my bet is that they will get emulated > > to I2C transfers. SMBus controllers are more common on PC hardware and > > above I'd say, and those seem to have so far their custom firmware > > methods to shut down. > > Right, but keep in mind that (normal) emulation will still go through > the unconditional locking in i2c_smbus_xfer, so that will also be a > source of problems/oopses/splats. Damn, yes, I forgot that smbus_xfer_emulated uses the unlocked __i2c_transfer. So, you are totally right, we need this extra dance to handle the locking. When it comes to adding smbus_xfer_irqless, I'd still propose to wait until we have a user for it.
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