X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Facpi%2Fhardware%2Fhwsleep.c;h=25dccdf179b9e4814ca52669f268f4409b34ce6b;hb=a6629105dd03d370fcb31e97bddf223fa4bb651e;hp=dba3cfbe8cba9e3235970e7b972e7f54da24c4af;hpb=952f4a0a9b27e6dbd5d32e330b3f609ebfa0b061;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index dba3cfbe8cb..25dccdf179b 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -78,19 +78,17 @@ acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
 		return_ACPI_STATUS(status);
 	}
 
-	/* Set the vector */
+	/*
+	 * According to the ACPI specification 2.0c and later, the 64-bit
+	 * waking vector should be cleared and the 32-bit waking vector should
+	 * be used, unless we want the wake-up code to be called by the BIOS in
+	 * Protected Mode.  Some systems (for example HP dv5-1004nr) are known
+	 * to fail to resume if the 64-bit vector is used.
+	 */
+	if (facs->version >= 1)
+		facs->xfirmware_waking_vector = 0;
 
-	if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
-		/*
-		 * ACPI 1.0 FACS or short table or optional X_ field is zero
-		 */
-		facs->firmware_waking_vector = (u32) physical_address;
-	} else {
-		/*
-		 * ACPI 2.0 FACS with valid X_ field
-		 */
-		facs->xfirmware_waking_vector = physical_address;
-	}
+	facs->firmware_waking_vector = (u32)physical_address;
 
 	return_ACPI_STATUS(AE_OK);
 }
@@ -134,20 +132,7 @@ acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
 	}
 
 	/* Get the vector */
-
-	if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
-		/*
-		 * ACPI 1.0 FACS or short table or optional X_ field is zero
-		 */
-		*physical_address =
-		    (acpi_physical_address) facs->firmware_waking_vector;
-	} else {
-		/*
-		 * ACPI 2.0 FACS with valid X_ field
-		 */
-		*physical_address =
-		    (acpi_physical_address) facs->xfirmware_waking_vector;
-	}
+	*physical_address = (acpi_physical_address)facs->firmware_waking_vector;
 
 	return_ACPI_STATUS(AE_OK);
 }
@@ -627,6 +612,13 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
 	}
 	/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
 
+	/*
+	 * Some BIOSes assume that WAK_STS will be cleared on resume and use
+	 * it to determine whether the system is rebooting or resuming. Clear
+	 * it for compatibility.
+	 */
+	acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+
 	acpi_gbl_system_awake_and_running = TRUE;
 
 	/* Enable power button */