Disable sleep requests for 5 sec after wakeup. This is needed for

some Toshiba and Thinkpad laptops.
Wakeup event is generated by power button or sleep button on some
laptops but this also generates SCI interrupt, and shutdown the system
as result.  So this is introduced so that acpi driver ignore given
requests for certain period.

1 files changed, 16 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 8aba3cc..5bbc688 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -458,6 +458,7 @@ acpi_attach(device_t dev)
      */
     sc->acpi_enabled = 1;
     sc->acpi_sstate = ACPI_STATE_S0;
+    sc->acpi_sleep_disabled = 0;
 
     /*
      * Create the control device
@@ -1296,6 +1297,13 @@ acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
     return(AE_OK);
 }
 
+#define ACPI_MINIMUM_AWAKETIME	5
+
+static void
+acpi_sleep_enable(void *arg)
+{
+    ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
+}
 
 /*
  * Set the system sleep state
@@ -1315,6 +1323,9 @@ acpi_SetSleepState(struct acpi_softc *sc, int state)
     if (sc->acpi_sstate != ACPI_STATE_S0)
 	return_ACPI_STATUS(AE_BAD_PARAMETER);	/* avoid reentry */
 
+    if (sc->acpi_sleep_disabled)
+	return_ACPI_STATUS(AE_OK);
+
     switch (state) {
     case ACPI_STATE_S0:	/* XXX only for testing */
 	status = AcpiEnterSleepState((UINT8)state);
@@ -1356,6 +1367,7 @@ acpi_SetSleepState(struct acpi_softc *sc, int state)
 	}
 
 	sc->acpi_sstate = state;
+	sc->acpi_sleep_disabled = 1;
 
 	if (state != ACPI_STATE_S1) {
 	    acpi_sleep_machdep(sc, state);
@@ -1392,6 +1404,10 @@ acpi_SetSleepState(struct acpi_softc *sc, int state)
 	status = AE_BAD_PARAMETER;
 	break;
     }
+
+    if (sc->acpi_sleep_disabled)
+	timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
+
     return_ACPI_STATUS(status);
 }