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path: root/drivers/acpi/acpica/tbinstal.c
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Diffstat (limited to 'drivers/acpi/acpica/tbinstal.c')
-rw-r--r--drivers/acpi/acpica/tbinstal.c161
1 files changed, 22 insertions, 139 deletions
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 4620f3c68c13..0dfc0ac3c141 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -48,54 +48,6 @@
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")
-/* Local prototypes */
-static u8
-acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_compare_tables
- *
- * PARAMETERS: table_desc - Table 1 descriptor to be compared
- * table_index - Index of table 2 to be compared
- *
- * RETURN: TRUE if both tables are identical.
- *
- * DESCRIPTION: This function compares a table with another table that has
- * already been installed in the root table list.
- *
- ******************************************************************************/
-
-static u8
-acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
-{
- acpi_status status = AE_OK;
- u8 is_identical;
- struct acpi_table_header *table;
- u32 table_length;
- u8 table_flags;
-
- status =
- acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
- &table, &table_length, &table_flags);
- if (ACPI_FAILURE(status)) {
- return (FALSE);
- }
-
- /*
- * Check for a table match on the entire table length,
- * not just the header.
- */
- is_identical = (u8)((table_desc->length != table_length ||
- memcmp(table_desc->pointer, table, table_length)) ?
- FALSE : TRUE);
-
- /* Release the acquired table */
-
- acpi_tb_release_table(table, table_length, table_flags);
- return (is_identical);
-}
-
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_table_with_override
@@ -112,7 +64,6 @@ acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
* table array.
*
******************************************************************************/
-
void
acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
u8 override, u32 *table_index)
@@ -210,95 +161,29 @@ acpi_tb_install_standard_table(acpi_physical_address address,
goto release_and_exit;
}
- /* Validate and verify a table before installation */
-
- status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
- if (ACPI_FAILURE(status)) {
- goto release_and_exit;
- }
-
/* Acquire the table lock */
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (reload) {
- /*
- * Validate the incoming table signature.
- *
- * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
- * 2) We added support for OEMx tables, signature "OEM".
- * 3) Valid tables were encountered with a null signature, so we just
- * gave up on validating the signature, (05/2008).
- * 4) We encountered non-AML tables such as the MADT, which caused
- * interpreter errors and kernel faults. So now, we once again allow
- * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
- */
- if ((new_table_desc.signature.ascii[0] != 0x00) &&
- (!ACPI_COMPARE_NAME
- (&new_table_desc.signature, ACPI_SIG_SSDT))
- && (strncmp(new_table_desc.signature.ascii, "OEM", 3))) {
- ACPI_BIOS_ERROR((AE_INFO,
- "Table has invalid signature [%4.4s] (0x%8.8X), "
- "must be SSDT or OEMx",
- acpi_ut_valid_nameseg(new_table_desc.
- signature.
- ascii) ?
- new_table_desc.signature.
- ascii : "????",
- new_table_desc.signature.integer));
-
- status = AE_BAD_SIGNATURE;
- goto unlock_and_exit;
- }
-
- /* Check if table is already registered */
-
- for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
- ++i) {
- /*
- * Check for a table match on the entire table length,
- * not just the header.
- */
- if (!acpi_tb_compare_tables(&new_table_desc, i)) {
- continue;
- }
+ /* Validate and verify a table before installation */
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
+ if (ACPI_FAILURE(status)) {
+ if (status == AE_CTRL_TERMINATE) {
/*
- * Note: the current mechanism does not unregister a table if it is
- * dynamically unloaded. The related namespace entries are deleted,
- * but the table remains in the root table list.
- *
- * The assumption here is that the number of different tables that
- * will be loaded is actually small, and there is minimal overhead
- * in just keeping the table in case it is needed again.
- *
- * If this assumption changes in the future (perhaps on large
- * machines with many table load/unload operations), tables will
- * need to be unregistered when they are unloaded, and slots in the
- * root table list should be reused when empty.
+ * Table was unloaded, allow it to be reloaded.
+ * As we are going to return AE_OK to the caller, we should
+ * take the responsibility of freeing the input descriptor.
+ * Refill the input descriptor to ensure
+ * acpi_tb_install_table_with_override() can be called again to
+ * indicate the re-installation.
*/
- if (acpi_gbl_root_table_list.tables[i].flags &
- ACPI_TABLE_IS_LOADED) {
-
- /* Table is still loaded, this is an error */
-
- status = AE_ALREADY_EXISTS;
- goto unlock_and_exit;
- } else {
- /*
- * Table was unloaded, allow it to be reloaded.
- * As we are going to return AE_OK to the caller, we should
- * take the responsibility of freeing the input descriptor.
- * Refill the input descriptor to ensure
- * acpi_tb_install_table_with_override() can be called again to
- * indicate the re-installation.
- */
- acpi_tb_uninstall_table(&new_table_desc);
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- *table_index = i;
- return_ACPI_STATUS(AE_OK);
- }
+ acpi_tb_uninstall_table(&new_table_desc);
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ *table_index = i;
+ return_ACPI_STATUS(AE_OK);
}
+ goto unlock_and_exit;
}
/* Add the table to the global root table list */
@@ -306,14 +191,10 @@ acpi_tb_install_standard_table(acpi_physical_address address,
acpi_tb_install_table_with_override(&new_table_desc, override,
table_index);
- /* Invoke table handler if present */
+ /* Invoke table handler */
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- if (acpi_gbl_table_handler) {
- (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_INSTALL,
- new_table_desc.pointer,
- acpi_gbl_table_handler_context);
- }
+ acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
unlock_and_exit:
@@ -382,9 +263,11 @@ void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
finish_override:
- /* Validate and verify a table before overriding */
-
- status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
+ /*
+ * Validate and verify a table before overriding, no nested table
+ * duplication check as it's too complicated and unnecessary.
+ */
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
if (ACPI_FAILURE(status)) {
return;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-19 06:36:31 +0300