Re: [PATCH] iommu/exynos: Get rid of 'struct exynos_iommu_owner' exynos_iommu_owner

[Joerg Roedel]

Hi Marek,

On Thu, Apr 09, 2020 at 03:58:00PM +0200, Marek Szyprowski wrote:
> The main problem after your conversion is the fact that ->probe_device() 
> is called very early, before any other platform device (thus IOMMU 
> controller) is is probed. It doesn't handle EPROBE_DEFER too.

I don't quite understand why probe_device() is called too early, as it
is called at the same time add_device() was called before. But anyway,
I have seen a similar problem on OMAP. If the SYSMMU for a master is not
probed yet when probe_device() is called, it can just return -ENODEV and
in your driver you just call but_iommu_probe() when a new SYSMMU got
initialized to re-probe uninitialized masters on the bus. This patch-set
contains a change to export bus_iommu_probe() for exactly that reason.

What do you think?

Regards,

	Joerg