[ofw] RE: When one can release CA interface

[Leonid Keller]

I don't quite understand that.
If CA has been deregistered, i.e. ib_deregister_ca() has been called,
there is more CI_CA object.
All resources (PDs, CQs, QPs) are released.
How can IBAL send to CA MADs ?
  

> -----Original Message-----
> From: Smith, Stan [mailto:stan.smith at intel.com] 
> Sent: Tuesday, September 01, 2009 7:29 PM
> To: Leonid Keller; Tzachi Dar
> Cc: ofw_list
> Subject: RE: When one can release CA interface
> 
> Leonid Keller wrote:
> > fdo_release_resources() in bus_pnp.c releases the last 
> interface with 
> > low-level driver only after IBAL cleanup with the following
> > explanation:
> >
> > /* AL needs the HCA to stick around until AL cleanup has completed.
> > ... */
> >
> > My question is - why ?
> > How may/can IBAL proceed to work with HCA after CA has been 
> > deregistered ?
> > What kind of works could be still pending ?
> 
> 
> IBAL MAD processing threads may be in process of forwarding a 
> MAD and/or MAD processing with the outcome of eventually 
> accessing the HCA device. If the HCA is remove before AL 
> shutdown.....boom!
>