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nexedi
linux
Commits
bdf3aaf9
Commit
bdf3aaf9
authored
Mar 09, 2007
by
Len Brown
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Pull bugzilla-8066 into release branch
parents
b2526300
610a3d06
Changes
1
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1 changed file
with
23 additions
and
2 deletions
+23
-2
drivers/acpi/events/evmisc.c
drivers/acpi/events/evmisc.c
+23
-2
No files found.
drivers/acpi/events/evmisc.c
View file @
bdf3aaf9
...
...
@@ -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.
*
*****************************************************************************/
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
)
{
...
...
@@ -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
* enforces this. This interface releases the interpreter if we must wait.
*/
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
))
{
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
* the lock as a standard mutex.
...
...
@@ -506,6 +521,11 @@ acpi_status acpi_ev_release_global_lock(void)
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
)
{
/* Allow any thread to release the lock */
...
...
@@ -529,7 +549,8 @@ acpi_status acpi_ev_release_global_lock(void)
acpi_gbl_global_lock_acquired
=
FALSE
;
/* 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
);
return_ACPI_STATUS
(
status
);
}
...
...
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