Commit 2c5b9bde authored Sep 30, 2020 by Jonathan Cameron Committed by Rafael J. Wysocki Oct 02, 2020

ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3



In ACPI 6.3, the Memory Proximity Domain Attributes Structure
changed substantially.  One of those changes was that the flag
for "Memory Proximity Domain field is valid" was deprecated.

This was because the field "Proximity Domain for the Memory"
became a required field and hence having a validity flag makes
no sense.

So the correct logic is to always assume the field is there.
Current code assumes it never is.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 01aabca2

drivers/acpi/numa/hmat.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -424,7 +424,8 @@ static int __init hmat_parse_proximity_domain(union acpi_subtable_headers *heade
		pr_info("HMAT: Memory Flags:%04x Processor Domain:%u Memory Domain:%u\n",
		p->flags, p->processor_PD, p->memory_PD);

		if (p->flags & ACPI_HMAT_MEMORY_PD_VALID && hmat_revision == 1) {
		if ((hmat_revision == 1 && p->flags & ACPI_HMAT_MEMORY_PD_VALID) \|\|
		hmat_revision > 1) {
		target = find_mem_target(p->memory_PD);
		if (!target) {
		pr_debug("HMAT: Memory Domain missing from SRAT\n");

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