提交 bdf3aaf9 编写于 作者: L Len Brown

Pull bugzilla-8066 into release branch

...@@ -423,6 +423,8 @@ static acpi_status acpi_ev_remove_global_lock_handler(void) ...@@ -423,6 +423,8 @@ static acpi_status acpi_ev_remove_global_lock_handler(void)
* the global lock appear as a standard mutex on the OS side. * the global lock appear as a standard mutex on the OS side.
* *
*****************************************************************************/ *****************************************************************************/
static acpi_thread_id acpi_ev_global_lock_thread_id;
static int acpi_ev_global_lock_acquired;
acpi_status acpi_ev_acquire_global_lock(u16 timeout) acpi_status acpi_ev_acquire_global_lock(u16 timeout)
{ {
...@@ -435,11 +437,24 @@ acpi_status acpi_ev_acquire_global_lock(u16 timeout) ...@@ -435,11 +437,24 @@ acpi_status acpi_ev_acquire_global_lock(u16 timeout)
* Only one thread can acquire the GL at a time, the global_lock_mutex * Only one thread can acquire the GL at a time, the global_lock_mutex
* enforces this. This interface releases the interpreter if we must wait. * enforces this. This interface releases the interpreter if we must wait.
*/ */
status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, timeout); status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, 0);
if (status == AE_TIME) {
if (acpi_ev_global_lock_thread_id == acpi_os_get_thread_id()) {
acpi_ev_global_lock_acquired++;
return AE_OK;
}
}
if (ACPI_FAILURE(status)) {
status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, timeout);
}
if (ACPI_FAILURE(status)) { if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
acpi_ev_global_lock_thread_id = acpi_os_get_thread_id();
acpi_ev_global_lock_acquired++;
/* /*
* Make sure that a global lock actually exists. If not, just treat * Make sure that a global lock actually exists. If not, just treat
* the lock as a standard mutex. * the lock as a standard mutex.
...@@ -506,6 +521,11 @@ acpi_status acpi_ev_release_global_lock(void) ...@@ -506,6 +521,11 @@ acpi_status acpi_ev_release_global_lock(void)
return_ACPI_STATUS(AE_NOT_ACQUIRED); return_ACPI_STATUS(AE_NOT_ACQUIRED);
} }
acpi_ev_global_lock_acquired--;
if (acpi_ev_global_lock_acquired > 0) {
return AE_OK;
}
if (acpi_gbl_global_lock_present) { if (acpi_gbl_global_lock_present) {
/* Allow any thread to release the lock */ /* Allow any thread to release the lock */
...@@ -529,7 +549,8 @@ acpi_status acpi_ev_release_global_lock(void) ...@@ -529,7 +549,8 @@ acpi_status acpi_ev_release_global_lock(void)
acpi_gbl_global_lock_acquired = FALSE; acpi_gbl_global_lock_acquired = FALSE;
/* Release the local GL mutex */ /* Release the local GL mutex */
acpi_ev_global_lock_thread_id = 0;
acpi_ev_global_lock_acquired = 0;
acpi_os_release_mutex(acpi_gbl_global_lock_mutex); acpi_os_release_mutex(acpi_gbl_global_lock_mutex);
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册