Re: [RFC PATCH 1/4] i2c: allow drivers to announce that they are IRQ safe

[Wolfram Sang <wsa@xxxxxxxxxxxxx>]

> LGTM.
> Though I would expect that call back optional, so, it means that I2C
> core, perhaps, may put some generic one as a stub.

Right, stupid me. After some many variations, I missed to add one
condition to this version. It should have been something like the
following:

> > -               ret = adap->algo->master_xfer(adap, msgs, num);
> > +               if (in_atomic() || irqs_disabled())

	if (adap->algo->master_xfer_irqless && (in_atomic() || irqs_disabled()))

> > +                       ret = adap->algo->master_xfer_irqless(adap, msgs, num);
> > +               else
> > +                       ret = adap->algo->master_xfer(adap, msgs, num);
> > +
> >                 if (ret != -EAGAIN)
> >                         break;

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