aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/sleep.c
diff options
context:
space:
mode:
authorRafael J. Wysocki <rjw@sisk.pl>2012-05-29 15:21:07 -0400
committerRafael J. Wysocki <rjw@sisk.pl>2012-05-29 15:21:07 -0400
commitdbe9a2edd17d843d80faf2b99f20a691c1853418 (patch)
treecdb93bb64452b6e60ffd8ca1ceea75716a1e9f64 /drivers/acpi/sleep.c
parent38c92fff988d518fe80dc23d0d44d66bd7e47ddd (diff)
ACPI / PM: Make acpi_pm_device_sleep_state() follow the specification
The comparison between the system sleep state being entered and the lowest system sleep state the given device may wake up from in acpi_pm_device_sleep_state() is reversed, because the specification (ACPI 5.0) says that for wakeup to work: "The sleeping state being entered must be less than or equal to the power state declared in element 1 of the _PRW object." In other words, the state returned by _PRW is the deepest (lowest-power) system sleep state the device is capable of waking up the system from. Moreover, acpi_pm_device_sleep_state() also should check if the wakeup capability is supported through ACPI, because in principle it may be done via native PCIe PME, for example, in which case _SxW should not be evaluated. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/acpi/sleep.c')
-rw-r--r--drivers/acpi/sleep.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index a564fc3ffa1c..d8b381e94ee2 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -773,8 +773,8 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
773 * can wake the system. _S0W may be valid, too. 773 * can wake the system. _S0W may be valid, too.
774 */ 774 */
775 if (acpi_target_sleep_state == ACPI_STATE_S0 || 775 if (acpi_target_sleep_state == ACPI_STATE_S0 ||
776 (device_may_wakeup(dev) && 776 (device_may_wakeup(dev) && adev->wakeup.flags.valid &&
777 adev->wakeup.sleep_state <= acpi_target_sleep_state)) { 777 adev->wakeup.sleep_state >= acpi_target_sleep_state)) {
778 acpi_status status; 778 acpi_status status;
779 779
780 acpi_method[3] = 'W'; 780 acpi_method[3] = 'W';