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ACPI: Convert wake_sleep_flags to a value instead of function

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With commit a2ef5c4fd4
"ACPI: Move module parameter gts and bfs to sleep.c" the wake_sleep_flags
is required when calling acpi_enter_sleep_state, which means
that if there are functions outside the sleep.c code they
can't get the wake_sleep_flags values.

This converts the function in to a exported value and converts
the module config operands to a function.

Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Lin Ming <ming.m.lin@intel.com>
[v2: Parameters can be turned on/off dynamically]
[v3: unsigned char -> u8]
[v4: val -> kp->arg]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1335150198-21899-2-git-send-email-konrad.wilk@oracle.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2012-04-22 23:03:17 -04:00 committed by H. Peter Anvin
parent cbf2829b61
commit 2a14e541ed
2 changed files with 32 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/acpi/sleep.h
View File

@ -9,6 +9,8 @@ extern long saved_magic;
extern int wakeup_pmode_return;
extern u8 wake_sleep_flags;
extern unsigned long acpi_copy_wakeup_routine(unsigned long);
extern void wakeup_long64(void);

56
drivers/acpi/sleep.c
View File

@ -28,24 +28,34 @@
#include "internal.h"
#include "sleep.h"
u8 wake_sleep_flags = ACPI_NO_OPTIONAL_METHODS;
static unsigned int gts, bfs;
module_param(gts, uint, 0644);
module_param(bfs, uint, 0644);
static int set_param_wake_flag(const char *val, struct kernel_param *kp)
{
int ret = param_set_int(val, kp);
if (ret)
return ret;
if (kp->arg == (const char *)&gts) {
if (gts)
wake_sleep_flags |= ACPI_EXECUTE_GTS;
else
wake_sleep_flags &= ~ACPI_EXECUTE_GTS;
}
if (kp->arg == (const char *)&bfs) {
if (bfs)
wake_sleep_flags |= ACPI_EXECUTE_BFS;
else
wake_sleep_flags &= ~ACPI_EXECUTE_BFS;
}
return ret;
}
module_param_call(gts, set_param_wake_flag, param_get_int, &gts, 0644);
module_param_call(bfs, set_param_wake_flag, param_get_int, &bfs, 0644);
MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
static u8 wake_sleep_flags(void)
{
u8 flags = ACPI_NO_OPTIONAL_METHODS;
if (gts)
flags |= ACPI_EXECUTE_GTS;
if (bfs)
flags |= ACPI_EXECUTE_BFS;
return flags;
}
static u8 sleep_states[ACPI_S_STATE_COUNT];
static void acpi_sleep_tts_switch(u32 acpi_state)
@ -263,7 +273,6 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
{
acpi_status status = AE_OK;
u32 acpi_state = acpi_target_sleep_state;
u8 flags = wake_sleep_flags();
int error;
ACPI_FLUSH_CPU_CACHE();
@ -271,7 +280,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
switch (acpi_state) {
case ACPI_STATE_S1:
barrier();
status = acpi_enter_sleep_state(acpi_state, flags);
status = acpi_enter_sleep_state(acpi_state, wake_sleep_flags);
break;
case ACPI_STATE_S3:
@ -286,7 +295,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
/* Reprogram control registers and execute _BFS */
acpi_leave_sleep_state_prep(acpi_state, flags);
acpi_leave_sleep_state_prep(acpi_state, wake_sleep_flags);
/* ACPI 3.0 specs (P62) says that it's the responsibility
* of the OSPM to clear the status bit [ implying that the
@ -550,30 +559,27 @@ static int acpi_hibernation_begin(void)
static int acpi_hibernation_enter(void)
{
u8 flags = wake_sleep_flags();
acpi_status status = AE_OK;
ACPI_FLUSH_CPU_CACHE();
/* This shouldn't return. If it returns, we have a problem */
status = acpi_enter_sleep_state(ACPI_STATE_S4, flags);
status = acpi_enter_sleep_state(ACPI_STATE_S4, wake_sleep_flags);
/* Reprogram control registers and execute _BFS */
acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags);
acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags);
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}
static void acpi_hibernation_leave(void)
{
u8 flags = wake_sleep_flags();
/*
* If ACPI is not enabled by the BIOS and the boot kernel, we need to
* enable it here.
*/
acpi_enable();
/* Reprogram control registers and execute _BFS */
acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags);
acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags);
/* Check the hardware signature */
if (facs && s4_hardware_signature != facs->hardware_signature) {
printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
@ -828,12 +834,10 @@ static void acpi_power_off_prepare(void)
static void acpi_power_off(void)
{
u8 flags = wake_sleep_flags();
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
printk(KERN_DEBUG "%s called\n", __func__);
local_irq_disable();
acpi_enter_sleep_state(ACPI_STATE_S5, flags);
acpi_enter_sleep_state(ACPI_STATE_S5, wake_sleep_flags);
}
/*