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path: root/drivers/acpi/tables
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-rw-r--r--drivers/acpi/tables/tbinstal.c22
-rw-r--r--drivers/acpi/tables/tbutils.c67
-rw-r--r--drivers/acpi/tables/tbxface.c14
-rw-r--r--drivers/acpi/tables/tbxfroot.c4
4 files changed, 96 insertions, 11 deletions
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index 2ad72f20455..698799901f5 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -124,9 +124,7 @@ acpi_tb_match_signature (
*
* RETURN: Status
*
- * DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must
- * already be loaded and validated.
- * Install the table into the global data structs.
+ * DESCRIPTION: Install the table into the global data structures.
*
******************************************************************************/
@@ -136,6 +134,7 @@ acpi_tb_install_table (
{
acpi_status status;
+
ACPI_FUNCTION_TRACE ("tb_install_table");
@@ -143,22 +142,33 @@ acpi_tb_install_table (
status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (status)) {
- ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
- table_info->pointer->signature, acpi_format_exception (status)));
+ ACPI_REPORT_ERROR (("Could not acquire table mutex, %s\n",
+ acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
+ /*
+ * Ignore a table that is already installed. For example, some BIOS
+ * ASL code will repeatedly attempt to load the same SSDT.
+ */
+ status = acpi_tb_is_table_installed (table_info);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+
/* Install the table into the global data structure */
status = acpi_tb_init_table_descriptor (table_info->type, table_info);
if (ACPI_FAILURE (status)) {
- ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
+ ACPI_REPORT_ERROR (("Could not install table [%4.4s], %s\n",
table_info->pointer->signature, acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
acpi_gbl_table_data[table_info->type].name, table_info->pointer));
+
+unlock_and_exit:
(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (status);
}
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
index e69d01d443d..6fc1e36e604 100644
--- a/drivers/acpi/tables/tbutils.c
+++ b/drivers/acpi/tables/tbutils.c
@@ -61,6 +61,67 @@ acpi_tb_handle_to_object (
/*******************************************************************************
*
+ * FUNCTION: acpi_tb_is_table_installed
+ *
+ * PARAMETERS: new_table_desc - Descriptor for new table being installed
+ *
+ * RETURN: Status - AE_ALREADY_EXISTS if the table is already installed
+ *
+ * DESCRIPTION: Determine if an ACPI table is already installed
+ *
+ * MUTEX: Table data structures should be locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_is_table_installed (
+ struct acpi_table_desc *new_table_desc)
+{
+ struct acpi_table_desc *table_desc;
+
+
+ ACPI_FUNCTION_TRACE ("tb_is_table_installed");
+
+
+ /* Get the list descriptor and first table descriptor */
+
+ table_desc = acpi_gbl_table_lists[new_table_desc->type].next;
+
+ /* Examine all installed tables of this type */
+
+ while (table_desc) {
+ /* Compare Revision and oem_table_id */
+
+ if ((table_desc->loaded_into_namespace) &&
+ (table_desc->pointer->revision ==
+ new_table_desc->pointer->revision) &&
+ (!ACPI_MEMCMP (table_desc->pointer->oem_table_id,
+ new_table_desc->pointer->oem_table_id, 8))) {
+ /* This table is already installed */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
+ "Table [%4.4s] already installed: Rev %X oem_table_id [%8.8s]\n",
+ new_table_desc->pointer->signature,
+ new_table_desc->pointer->revision,
+ new_table_desc->pointer->oem_table_id));
+
+ new_table_desc->owner_id = table_desc->owner_id;
+ new_table_desc->installed_desc = table_desc;
+
+ return_ACPI_STATUS (AE_ALREADY_EXISTS);
+ }
+
+ /* Get next table on the list */
+
+ table_desc = table_desc->next;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_tb_validate_table_header
*
* PARAMETERS: table_header - Logical pointer to the table
@@ -157,7 +218,7 @@ acpi_tb_verify_table_checksum (
/* Compute the checksum on the table */
- checksum = acpi_tb_checksum (table_header, table_header->length);
+ checksum = acpi_tb_generate_checksum (table_header, table_header->length);
/* Return the appropriate exception */
@@ -175,7 +236,7 @@ acpi_tb_verify_table_checksum (
/*******************************************************************************
*
- * FUNCTION: acpi_tb_checksum
+ * FUNCTION: acpi_tb_generate_checksum
*
* PARAMETERS: Buffer - Buffer to checksum
* Length - Size of the buffer
@@ -187,7 +248,7 @@ acpi_tb_verify_table_checksum (
******************************************************************************/
u8
-acpi_tb_checksum (
+acpi_tb_generate_checksum (
void *buffer,
u32 length)
{
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index ca2dbdd23ed..e18a05d1b9b 100644
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -182,10 +182,23 @@ acpi_load_table (
return_ACPI_STATUS (status);
}
+ /* Check signature for a valid table type */
+
+ status = acpi_tb_recognize_table (&table_info, ACPI_TABLE_ALL);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
/* Install the new table into the local data structures */
status = acpi_tb_install_table (&table_info);
if (ACPI_FAILURE (status)) {
+ if (status == AE_ALREADY_EXISTS) {
+ /* Table already exists, no error */
+
+ status = AE_OK;
+ }
+
/* Free table allocated by acpi_tb_get_table_body */
acpi_tb_delete_single_table (&table_info);
@@ -261,6 +274,7 @@ acpi_unload_table (
* simply a position within the hierarchy
*/
acpi_ns_delete_namespace_by_owner (table_desc->owner_id);
+ acpi_ut_release_owner_id (&table_desc->owner_id);
table_desc = table_desc->next;
}
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
index abb4c934656..87dccdda9ae 100644
--- a/drivers/acpi/tables/tbxfroot.c
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -93,14 +93,14 @@ acpi_tb_validate_rsdp (
/* Check the standard checksum */
- if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
+ if (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
return (AE_BAD_CHECKSUM);
}
/* Check extended checksum if table version >= 2 */
if ((rsdp->revision >= 2) &&
- (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) {
+ (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) {
return (AE_BAD_CHECKSUM);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 22:23:22 +0000