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path: root/drivers/acpi/acpi_lpss.c
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Diffstat (limited to 'drivers/acpi/acpi_lpss.c')
-rw-r--r--drivers/acpi/acpi_lpss.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 38a286975c31..9706613eecf9 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -22,6 +22,7 @@
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/pwm.h>
+#include <linux/suspend.h>
#include <linux/delay.h>
#include "internal.h"
@@ -878,6 +879,7 @@ static void acpi_lpss_dismiss(struct device *dev)
#define LPSS_GPIODEF0_DMA_LLP BIT(13)
static DEFINE_MUTEX(lpss_iosf_mutex);
+static bool lpss_iosf_d3_entered;
static void lpss_iosf_enter_d3_state(void)
{
@@ -920,6 +922,9 @@ static void lpss_iosf_enter_d3_state(void)
iosf_mbi_modify(LPSS_IOSF_UNIT_LPIOEP, MBI_CR_WRITE,
LPSS_IOSF_GPIODEF0, value1, mask1);
+
+ lpss_iosf_d3_entered = true;
+
exit:
mutex_unlock(&lpss_iosf_mutex);
}
@@ -934,6 +939,11 @@ static void lpss_iosf_exit_d3_state(void)
mutex_lock(&lpss_iosf_mutex);
+ if (!lpss_iosf_d3_entered)
+ goto exit;
+
+ lpss_iosf_d3_entered = false;
+
iosf_mbi_modify(LPSS_IOSF_UNIT_LPIOEP, MBI_CR_WRITE,
LPSS_IOSF_GPIODEF0, value1, mask1);
@@ -943,6 +953,7 @@ static void lpss_iosf_exit_d3_state(void)
iosf_mbi_modify(LPSS_IOSF_UNIT_LPIO1, MBI_CFG_WRITE,
LPSS_IOSF_PMCSR, value2, mask2);
+exit:
mutex_unlock(&lpss_iosf_mutex);
}
@@ -961,7 +972,8 @@ static int acpi_lpss_suspend(struct device *dev, bool wakeup)
* wrong status for devices being about to be powered off. See
* lpss_iosf_enter_d3_state() for further information.
*/
- if (lpss_quirks & LPSS_QUIRK_ALWAYS_POWER_ON && iosf_mbi_available())
+ if (acpi_target_system_state() == ACPI_STATE_S0 &&
+ lpss_quirks & LPSS_QUIRK_ALWAYS_POWER_ON && iosf_mbi_available())
lpss_iosf_enter_d3_state();
return ret;