tree f31c80f6079688c879048751172e305100c37eb9
parent ee1b8aba9bdb4b2e478da65ea098cfe5c337a46c
parent 64609732dac9bc2180c834babfe6ad0ce0d1ab46
author Tom Rini <trini@konsulko.com> 1732484492 -0600
committer Tom Rini <trini@konsulko.com> 1732484492 -0600

Merge patch series "Fix device removal order for Apple dart iommu"

Janne Grunau <j@jannau.net> says:

Starting with v2024.10 dev_iommu_dma_unmap calls during device removal
trigger a NULL pointer dereference in the Apple dart iommu driver. The
iommu device is removed before its user. The sparsely used DM_FLAG_VITAL
flag is intended to describe this dependency. Add it to the driver.

Adding this flag is unfortunately not enough since the boot routines
except the arm one simply remove all drivers. Add and use a new function
which calls
    dm_remove_devioce_flags(DM_REMOVE_ACTIVE_ALL | DM_REMOVE_NON_VITAL);
    dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
to ensure this order dependency is head consistently.

Link: https://lore.kernel.org/r/20241123-iommu_apple_dart_ordering-v2-0-cc2ade6dde97@jannau.net