The eCos, QNX, ChorusOs irq handling API

[Joel Sherrill]

Chris Johns wrote:
> 
> till wrote:
> 
> > On the point of driver unloding: I absolutely agree with Sergei on that
> > this is NOT the job of irqOff.
> 
> I think this is covered in PR127. IMO driver resources should be handled via the
> unregister and/or close calls.

This is the better way I think.  I would expect to possibly see device
driver 
resources allocated and freed in the following pairings:

  + driver initialize and unregister
  + open and close
  + interrupt installation and removal

IMO those are the naturally symmetrical places to do it.

> --
>   Chris Johns, cjohns at cybertec.com.au

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