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acpi: Clear reserved bits in IORT

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The IORT spec says that reserved bits must be set to zero, thus clear
all fields of the struct before starting to fill out non-reserved
fields.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
This commit is contained in:
Patrick Rudolph 2025-03-16 09:32:54 +01:00 • committed by Tom Rini
parent 0ae343239b
commit fe8844f4ad
1 changed files with 4 additions and 0 deletions
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4
lib/acpi/acpi_table.c
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@ -615,6 +615,7 @@ int acpi_iort_add_named_component(struct acpi_ctx *ctx,
node->length += strlen(device_name) + 1;
comp = (struct acpi_iort_named_component *)node->node_data;
memset(comp, '\0', sizeof(struct acpi_iort_named_component));
comp->node_flags = node_flags;
comp->memory_properties = memory_properties;
@ -655,6 +656,8 @@ int acpi_iort_add_rc(struct acpi_ctx *ctx,
node->length += sizeof(struct acpi_iort_id_mapping) * num_mappings;
rc = (struct acpi_iort_rc *)node->node_data;
memset(rc, '\0', sizeof(struct acpi_iort_rc));
rc->mem_access_properties = mem_access_properties;
rc->ats_attributes = ats_attributes;
rc->pci_segment_number = pci_segment_number;
@ -713,6 +716,7 @@ int acpi_iort_add_smmu_v3(struct acpi_ctx *ctx,
node->length += sizeof(struct acpi_iort_id_mapping) * num_mappings;
smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
memset(smmu, '\0', sizeof(struct acpi_iort_smmu_v3));
smmu->base_address = base_address;
smmu->flags = flags;