[v7,4/6] ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3
diff mbox series

Message ID 20200713155600.2272743-5-Jonathan.Cameron@huawei.com
State New
Headers show
  • ACPI: Support Generic Initiator proximity domains
Related show

Commit Message

Jonathan Cameron July 13, 2020, 3:55 p.m. UTC
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>
 drivers/acpi/numa/hmat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff mbox series

diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 3c0414816772..7ad2d5882a7d 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -424,7 +424,7 @@  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 ((p->flags & ACPI_HMAT_MEMORY_PD_VALID && hmat_revision == 1) || hmat_revision == 2) {
 		target = find_mem_target(p->memory_PD);
 		if (!target) {
 			pr_debug("HMAT: Memory Domain missing from SRAT\n");