linux/drivers/acpi/arm64
Robin Murphy da5fb9e1ad ACPI/IORT: Check node revision for PMCG resources
The original version of the IORT PMCG definition had an oversight
wherein there was no way to describe the second register page for an
implementation using the recommended RELOC_CTRS feature. Although the
spec was fixed, and the final patches merged to ACPICA and Linux written
against the new version, it seems that some old firmware based on the
original revision has survived and turned up in the wild.

Add a check for the original PMCG definition, and avoid filling in the
second memory resource with nonsense if so. Otherwise it is likely that
something horrible will happen when the PMCG driver attempts to probe.

Reported-by: Michael Petlan <mpetlan@redhat.com>
Fixes: 24e5160493 ("ACPI/IORT: Add support for PMCG")
Cc: <stable@vger.kernel.org> # 5.2.x
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Link: https://lore.kernel.org/r/75628ae41c257fb73588f7bf1c4459160e04be2b.1643916258.git.robin.murphy@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-02-09 18:16:22 +00:00
..
dma.c ACPI: arm64: Move DMA setup operations out of IORT 2021-06-25 15:02:43 +02:00
gtdt.c acpi/arm64: fix next_platform_timer() section mismatch error 2021-10-12 17:41:19 +01:00
iort.c ACPI/IORT: Check node revision for PMCG resources 2022-02-09 18:16:22 +00:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile ACPI: arm64: Move DMA setup operations out of IORT 2021-06-25 15:02:43 +02:00