diff options
Diffstat (limited to 'drivers/acpi/executer/exutils.c')
-rw-r--r-- | drivers/acpi/executer/exutils.c | 58 |
1 files changed, 26 insertions, 32 deletions
diff --git a/drivers/acpi/executer/exutils.c b/drivers/acpi/executer/exutils.c index 6b0aeccbb69b..c0837af0acb1 100644 --- a/drivers/acpi/executer/exutils.c +++ b/drivers/acpi/executer/exutils.c @@ -240,72 +240,66 @@ void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc) * PARAMETERS: field_flags - Flags with Lock rule: * always_lock or never_lock * - * RETURN: TRUE/FALSE indicating whether the lock was actually acquired + * RETURN: None * - * DESCRIPTION: Obtain the global lock and keep track of this fact via two - * methods. A global variable keeps the state of the lock, and - * the state is returned to the caller. + * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field + * flags specifiy that it is to be obtained before field access. * ******************************************************************************/ -u8 acpi_ex_acquire_global_lock(u32 field_flags) +void acpi_ex_acquire_global_lock(u32 field_flags) { - u8 locked = FALSE; acpi_status status; ACPI_FUNCTION_TRACE(ex_acquire_global_lock); - /* Only attempt lock if the always_lock bit is set */ + /* Only use the lock if the always_lock bit is set */ + + if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) { + return_VOID; + } - if (field_flags & AML_FIELD_LOCK_RULE_MASK) { + /* Attempt to get the global lock, wait forever */ - /* We should attempt to get the lock, wait forever */ + status = acpi_ex_acquire_mutex_object(ACPI_WAIT_FOREVER, + acpi_gbl_global_lock_mutex, + acpi_os_get_thread_id()); - status = acpi_ev_acquire_global_lock(ACPI_WAIT_FOREVER); - if (ACPI_SUCCESS(status)) { - locked = TRUE; - } else { - ACPI_EXCEPTION((AE_INFO, status, - "Could not acquire Global Lock")); - } + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not acquire Global Lock")); } - return_UINT8(locked); + return_VOID; } /******************************************************************************* * * FUNCTION: acpi_ex_release_global_lock * - * PARAMETERS: locked_by_me - Return value from corresponding call to - * acquire_global_lock. + * PARAMETERS: None * * RETURN: None * - * DESCRIPTION: Release the global lock if it is locked. + * DESCRIPTION: Release the ACPI hardware Global Lock * ******************************************************************************/ -void acpi_ex_release_global_lock(u8 locked_by_me) +void acpi_ex_release_global_lock(void) { acpi_status status; ACPI_FUNCTION_TRACE(ex_release_global_lock); - /* Only attempt unlock if the caller locked it */ - - if (locked_by_me) { + /* Release the global lock */ - /* OK, now release the lock */ - - status = acpi_ev_release_global_lock(); - if (ACPI_FAILURE(status)) { + status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex); + if (ACPI_FAILURE(status)) { - /* Report the error, but there isn't much else we can do */ + /* Report the error, but there isn't much else we can do */ - ACPI_EXCEPTION((AE_INFO, status, - "Could not release ACPI Global Lock")); - } + ACPI_EXCEPTION((AE_INFO, status, + "Could not release Global Lock")); } return_VOID; |