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b34f10c2dc
The AMD IOMMU initialisation registers the IRQ remapping domain for
each IOMMU before doing the final sanity check that every I/OAPIC is
covered.
This means that the AMD irq_remapping_select() function gets invoked
even when IRQ remapping has been disabled, eventually leading to a NULL
pointer dereference in alloc_irq_table().
Unfortunately, the IVRS isn't fully parsed early enough that the sanity
check can be done in time to registering the IRQ domain altogether.
Doing that would be nice, but is a larger and more error-prone task. The
simple fix is just for irq_remapping_select() to refuse to report a
match when IRQ remapping has disabled.
Link: https://lore.kernel.org/lkml/ed4be9b4-24ac-7128-c522-7ef359e8185d@gmx.at
Fixes:
|
History
|
|
|---|---|---|
| .. | ||
| amd_iommu.h | ||
| amd_iommu_types.h | ||
| debugfs.c | ||
| init.c | ||
| iommu.c | ||
| iommu_v2.c | ||
| Kconfig | ||
| Makefile | ||
| quirks.c | ||