[PATCH 3/5] acpi: Clear reserved bits in IORT

[Patrick Rudolph <patrick.rudolph@9elements.com>]

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>
---
 lib/acpi/acpi_table.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c
index 97cd8e8ddb0..fc43862ec37 100644
--- a/lib/acpi/acpi_table.c
+++ b/lib/acpi/acpi_table.c
@@ -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;
-- 
2.48.1