diff options
| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2025-03-16 09:32:55 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-04-03 11:38:14 -0600 |
| commit | 9c748576402cbc1381498e72800ecaeb99d2b355 (patch) | |
| tree | a70bca3825d3eff2ec42170fce2887cb945774fa /lib | |
| parent | fe8844f4ad7189a6309976ecc841d55735e3534a (diff) | |
acpi: Conditionally set mapping_offset in IORT
The spec recommends to set the mapping_offset only when there are
ID mappings as indicated by the mapping_count field.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/acpi/acpi_table.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index fc43862ec37..4ad1f56e961 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -649,7 +649,9 @@ int acpi_iort_add_rc(struct acpi_ctx *ctx, node->type = ACPI_IORT_NODE_PCI_ROOT_COMPLEX; node->revision = 2; node->mapping_count = num_mappings; - node->mapping_offset = sizeof(struct acpi_iort_node) + sizeof(struct acpi_iort_rc); + if (num_mappings) + node->mapping_offset = sizeof(struct acpi_iort_node) + + sizeof(struct acpi_iort_rc); node->length = sizeof(struct acpi_iort_node); node->length += sizeof(struct acpi_iort_rc); @@ -709,7 +711,9 @@ int acpi_iort_add_smmu_v3(struct acpi_ctx *ctx, node->type = ACPI_IORT_NODE_SMMU_V3; node->revision = 5; node->mapping_count = num_mappings; - node->mapping_offset = sizeof(struct acpi_iort_node) + sizeof(struct acpi_iort_smmu_v3); + if (num_mappings) + node->mapping_offset = sizeof(struct acpi_iort_node) + + sizeof(struct acpi_iort_smmu_v3); node->length = sizeof(struct acpi_iort_node); node->length += sizeof(struct acpi_iort_smmu_v3); |