PNP: make pnpacpi_suspend handle errors

pnpacpi_suspend() doesn't check the result returned by
acpi_pm_device_sleep_state() before passing it to acpi_bus_set_power(),
which may not be desirable.   Make it select the target power state of the
device using its second argument if acpi_pm_device_sleep_state() fails.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Looks-ok-to: Pavel Machek <pavel@ucw.cz>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index a5a372222d69..e6a2a9fc7f0a 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -130,11 +130,16 @@ static int pnpacpi_disable_resources(struct pnp_dev *dev)
 #ifdef CONFIG_ACPI_SLEEP
 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
 {
-        return acpi_bus_set_power((acpi_handle) dev->data,
-                                  acpi_pm_device_sleep_state(&dev->dev,
-                                                             device_may_wakeup
-                                                             (&dev->dev),
-                                                             NULL));
+        int power_state;
+
+        power_state = acpi_pm_device_sleep_state(&dev->dev,
+                                                device_may_wakeup(&dev->dev),
+                                                NULL);
+        if (power_state < 0)
+                power_state = (state.event == PM_EVENT_ON) ?
+                                ACPI_STATE_D0 : ACPI_STATE_D3;
+
+        return acpi_bus_set_power((acpi_handle) dev->data, power_state);
 }
 
 static int pnpacpi_resume(struct pnp_dev *dev)