[PATCH 06/15] cxl: Do not create vPHB if there are no AFU configuration records

[Andrew Donnellan]

On 11/07/16 21:50, Ian Munsie wrote:
> From: Ian Munsie <imunsie at au1.ibm.com>
>
> The vPHB model of the cxl kernel API is a hierarchy where the AFU is
> represented by the vPHB, and it's AFU configuration records are exposed
> as functions under that vPHB. If there are no AFU configuration records
> we will create a vPHB with nothing under it, which is a waste of
> resources and will opt us into EEH handling despite not having anything
> special to handle.
>
> This also does not make sense for cards using the peer model of the cxl
> kernel API, where the other functions of the device are exposed via
> additional peer physical functions rather than AFU configuration
> records. This model will also not work with the existing EEH handling in
> the cxl driver, as that is designed around the vPHB model.
>
> Skip creating the vPHB for AFUs without any AFU configuration records,
> and opt out of EEH handling for them.
>
> Signed-off-by: Ian Munsie <imunsie at au1.ibm.com>

Reviewed-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>


-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan at au1.ibm.com  IBM Australia Limited