lkml.org 
[lkml]   [2019]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/3] ACPI: Resolve objects on host-directed table loads
Date
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.voss@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
\
 
 \ /
  Last update: 2019-06-12 10:47    [W:0.041 / U:6.448 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site