On 01.08.2019 16:54, Oleksandr wrote: > On 01.08.19 17:34, Jan Beulich wrote: >> 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)?
For example. Or by using some positive value instead of the (negative) errno.h ones. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
