Messages in this thread | | | Date | Thu, 6 Oct 2022 15:01:14 +0100 | Subject | Re: [PATCH v4 05/16] iommu: Move bus setup to IOMMU device registration | From | Jon Hunter <> |
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Hi Robin,
On 15/08/2022 17:20, Robin Murphy wrote: > Move the bus setup to iommu_device_register(). This should allow > bus_iommu_probe() to be correctly replayed for multiple IOMMU instances, > and leaves bus_set_iommu() as a glorified no-op to be cleaned up next. > > At this point we can also handle cleanup better than just rolling back > the most-recently-touched bus upon failure - which may release devices > owned by other already-registered instances, and still leave devices on > other buses with dangling pointers to the failed instance. Now it's easy > to clean up the exact footprint of a given instance, no more, no less.
Since this change, I have noticed that the DRM driver on Tegra20 is failing to probe and I am seeing ...
tegra-gr2d 54140000.gr2d: failed to attach to domain: -19 drm drm: failed to initialize 54140000.gr2d: -19
Bisect points to this change and reverting it fixes it. Let me know if you have any thoughts.
Cheers Jon
-- nvpublic
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