[PATCH v2 1/3] ACPI: Resolve objects on host-directed table loads

[Nikolaus Voss]

If an ACPI SSDT overlay is loaded after built-in tables
have been loaded e.g. via configfs or efivar_ssdt_load()
it is necessary to rewalk the namespace to resolve
references. Without this, relative and absolute paths
like ^PCI0.SBUS or \_SB.PCI0.SBUS are not resolved
correctly.

Make configfs load use the same method as efivar_ssdt_load().

Signed-off-by: Nikolaus Voss <nikolaus.v...@loewensteinmedical.de>
---
 drivers/acpi/acpi_configfs.c   |  6 +-----
 drivers/acpi/acpica/tbxfload.c | 11 +++++++++++
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/acpi_configfs.c b/drivers/acpi/acpi_configfs.c
index f92033661239..663f0d88f912 100644
--- a/drivers/acpi/acpi_configfs.c
+++ b/drivers/acpi/acpi_configfs.c
@@ -56,11 +56,7 @@ static ssize_t acpi_table_aml_write(struct config_item *cfg,
        if (!table->header)
                return -ENOMEM;
 
-       ACPI_INFO(("Host-directed Dynamic ACPI Table Load:"));
-       ret = acpi_tb_install_and_load_table(
-                       ACPI_PTR_TO_PHYSADDR(table->header),
-                       ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, FALSE,
-                       &table->index);
+       ret = acpi_load_table(table->header);
        if (ret) {
                kfree(table->header);
                table->header = NULL;
diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index 4f30f06a6f78..ef8f8a9f3c9c 100644
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -297,6 +297,17 @@ acpi_status acpi_load_table(struct acpi_table_header 
*table)
        status = acpi_tb_install_and_load_table(ACPI_PTR_TO_PHYSADDR(table),
                                                
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
                                                FALSE, &table_index);
+
+       if (ACPI_SUCCESS(status)) {
+               /* Complete the initialization/resolution of package objects */
+
+               status = acpi_ns_walk_namespace(ACPI_TYPE_PACKAGE,
+                                               ACPI_ROOT_OBJECT,
+                                               ACPI_UINT32_MAX, 0,
+                                               acpi_ns_init_one_package,
+                                               NULL, NULL, NULL);
+       }
+
        return_ACPI_STATUS(status);
 }
 
-- 
2.17.1