Hi Jeffy,
On 2018-01-11 12:14, JeffyChen wrote:
Hi Marek,
Thanks for your reply.
On 01/11/2018 05:40 PM, Marek Szyprowski wrote:
Hi Jeffy,
On 2018-01-11 09:22, Jeffy Chen wrote:
With the probe-deferral mechanism, early initialisation hooks are no
longer needed.
Suggested-by: Robin Murphy <robin.murphy@xxxxxxx>
Signed-off-by: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
---
drivers/iommu/arm-smmu-v3.c | 2 +-
drivers/iommu/arm-smmu.c | 12 ++++++------
drivers/iommu/exynos-iommu.c | 2 +-
For Exynos IOMMU:
Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
IPMMU and MSM IOMMU are no longer multi-platform safe after this patch.
It breaks them in the same way as my commit 928055a01b3f ("iommu/exynos:
Remove custom platform device registration code") broke Exynos IOMMU.
You need a similar fix for them:
https://www.spinics.net/lists/arm-kernel/msg627648.html
hmmm, right, i did saw this fix in the rockchip iommu driver too.
and there're also some other iommu drivers put bus_set_iommu in their
probe() to avoid that.
maybe we can do it in the iommu framework?
for example:
1/ add a bus type member to struct iommu_device
2/ and a iommu_device_set_bus()
3/ do the bus_set_iommu stuff in iommu_device_register()
4/ undo bus_set_iommu in iommu_device_unregister()
Frankly, in case the device-tree based systems bus_set_iommu()
should not be needed at all. However for some legacy reasons it
is still required by a few bits of code (at least it was needed
some time ago). Probably it would be best if this is finally
resolved.
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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