On 01.08.19 17:34, Jan Beulich wrote:
Hi Jan
On 01.08.2019 16:31, Oleksandr wrote:
This is needed for the upcoming V2 of the IPMMU driver (ARM) [1] which may
request
deferred probing (returns -EPROBE_DEFER) depending on what device will be
probed the first
(Root device must be registered before Cache devices. If not the case,
driver will deny further Cache device probes until Root device is
registered).
As we can't guarantee a fixed pre-defined order for the device nodes in DT, we
need to be ready for the situation where devices being probed
in "any" order. So, framework (drivers/passthrough/arm/iommu.c) will be
modified a bit to be able to handle -EPROBE_DEFER returning by driver.
I'm sure this can be had without introducing a new error code.
By reusing existing one (EAGAIN comes to mind)?
Jan
--
Regards,
Oleksandr Tyshchenko
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