The patch titled
ACPI: Separate invocations of _GTS and _BFS from _PTS and _WAK
has been removed from the -mm tree. Its filename was
acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ACPI: Separate invocations of _GTS and _BFS from _PTS and _WAK
From: Rafael J. Wysocki <rjw@xxxxxxx>
The execution of ACPI global control methods _GTS and _BFS is currently tied
to the preparation to enter a sleep state and to the leaving of the sleep
state, respectively. However, these functions are called before disabling the
nonboot CPUs and after enabling them, respectively (in fact, on ACPI 1.0x
systems the first of them ought to be called before suspending devices), while
according to the ACPI specification, _GTS is to be executed right prior to
entering the system sleep state and _BFS is to be executed right after the
platfor firmware has returned control to the OS on wake up.
Move the execution of _GTS and _BFS to the right places.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/hardware/hwsleep.c | 75 ++++++++++++++++++++++--------
drivers/acpi/sleep/main.c | 7 ++
include/acpi/acpixf.h | 2
3 files changed, 66 insertions(+), 18 deletions(-)
diff -puN drivers/acpi/hardware/hwsleep.c~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak drivers/acpi/hardware/hwsleep.c
--- a/drivers/acpi/hardware/hwsleep.c~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak
+++ a/drivers/acpi/hardware/hwsleep.c
@@ -192,18 +192,13 @@ acpi_status acpi_enter_sleep_state_prep(
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
- /* Run the _PTS and _GTS methods */
+ /* Run the _PTS method */
status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
- status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- return_ACPI_STATUS(status);
- }
-
/* Setup the argument to _SST */
switch (sleep_state) {
@@ -262,6 +257,8 @@ acpi_status asmlinkage acpi_enter_sleep_
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 in_value;
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
@@ -307,6 +304,18 @@ acpi_status asmlinkage acpi_enter_sleep_
return_ACPI_STATUS(status);
}
+ /* Execute the _GTS method */
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
+
+ status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ return_ACPI_STATUS(status);
+ }
+
/* Get current value of PM1A control */
status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
@@ -473,17 +482,18 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_stat
/*******************************************************************************
*
- * FUNCTION: acpi_leave_sleep_state
+ * FUNCTION: acpi_leave_sleep_state_prep
*
- * PARAMETERS: sleep_state - Which sleep state we just exited
+ * PARAMETERS: sleep_state - Which sleep state we are exiting
*
* RETURN: Status
*
- * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
- * Called with interrupts ENABLED.
+ * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
+ * sleep.
+ * Called with interrupts DISABLED.
*
******************************************************************************/
-acpi_status acpi_leave_sleep_state(u8 sleep_state)
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
@@ -493,7 +503,7 @@ acpi_status acpi_leave_sleep_state(u8 sl
u32 PM1Acontrol;
u32 PM1Bcontrol;
- ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
/*
* Set SLP_TYPE and SLP_EN to state S0.
@@ -540,6 +550,41 @@ acpi_status acpi_leave_sleep_state(u8 sl
}
}
+ /* Execute the _BFS method */
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
+
+ status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_leave_sleep_state
+ *
+ * PARAMETERS: sleep_state - Which sleep state we just exited
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ * Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+acpi_status acpi_leave_sleep_state(u8 sleep_state)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
@@ -558,12 +603,6 @@ acpi_status acpi_leave_sleep_state(u8 sl
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
}
- arg.integer.value = sleep_state;
- status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
- }
-
/*
* GPEs must be enabled before _WAK is called as GPEs
* might get fired there
diff -puN drivers/acpi/sleep/main.c~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak drivers/acpi/sleep/main.c
--- a/drivers/acpi/sleep/main.c~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak
+++ a/drivers/acpi/sleep/main.c
@@ -139,6 +139,9 @@ static int acpi_pm_enter(suspend_state_t
break;
}
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(acpi_state);
+
/* ACPI 3.0 specs (P62) says that it's the responsabilty
* of the OSPM to clear the status bit [ implying that the
* POWER_BUTTON event should not reach userspace ]
@@ -272,6 +275,8 @@ static int acpi_hibernation_enter(void)
acpi_enable_wakeup_device(ACPI_STATE_S4);
/* This shouldn't return. If it returns, we have a problem */
status = acpi_enter_sleep_state(ACPI_STATE_S4);
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4);
local_irq_restore(flags);
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
@@ -284,6 +289,8 @@ static void acpi_hibernation_leave(void)
* enable it here.
*/
acpi_enable();
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4);
}
static void acpi_hibernation_finish(void)
diff -puN include/acpi/acpixf.h~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak include/acpi/acpixf.h
--- a/include/acpi/acpixf.h~acpi-separate-invocations-of-_gts-and-_bfs-from-_pts-and-_wak
+++ a/include/acpi/acpixf.h
@@ -335,6 +335,8 @@ acpi_status asmlinkage acpi_enter_sleep_
acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void);
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state);
+
acpi_status acpi_leave_sleep_state(u8 sleep_state);
#endif /* __ACXFACE_H__ */
_
Patches currently in -mm which might be from rjw@xxxxxxx are
origin.patch
git-acpi.patch
gregkh-driver-kset-convert-to-kobj_sysfs_ops-vs-git-acpi.patch
pm-acquire-device-locks-on-suspend-rev-3.patch
pm-acquire-device-locks-on-suspend-rev-3-checkpatch-fixes.patch
pm-acquire-device-locks-on-suspend-rev-3-checkpatch-fixes-2.patch
git-x86.patch
git-x86-vs-pm-acquire-device-locks-on-suspend-rev-3.patch
git-xfs.patch
cpufreq-initialise-default-governor-before-use.patch
page-allocator-clean-up-pcp-draining-functions.patch
page-allocator-clean-up-pcp-draining-functions-swsusp-fix.patch
page-allocator-clean-up-pcp-draining-functions-swsusp-fix-fix.patch
kernel-power-diskc-make-code-static.patch
make-kernel_shutdown_prepare-static.patch
remove-obsolete-sys-devices-power-state-docs.patch
proc-fix-the-threaded-proc-self.patch
shrink_slab-handle-bad-shrinkers.patch
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