commit 6158d3a2323835546c7cf83a170316fa77b726e0
Author: Matthew Garrett <mjg59@srcf.ucam.org>
Date:   Wed Oct 29 14:01:03 2008 -0700

    sony-laptop: ignore missing _DIS method on pic device
    
    At least the Vaio VGN-Z540N doesn't have this method, so let's not fail
    to suspend just because it doesn't exist.
    
    Signed-off-by: Adam Jackson <ajax@redhat.com>
    Acked-by: Mattia Dongili <malattia@linux.it>
    Cc: Len Brown <lenb@kernel.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 5a97d3a..f483c42 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -2315,8 +2315,10 @@ end:
  */
 static int sony_pic_disable(struct acpi_device *device)
 {
-	if (ACPI_FAILURE(acpi_evaluate_object(device->handle,
-			"_DIS", NULL, NULL)))
+	acpi_status ret = acpi_evaluate_object(device->handle, "_DIS", NULL,
+					       NULL);
+
+	if (ACPI_FAILURE(ret) && ret != AE_NOT_FOUND)
 		return -ENXIO;
 
 	dprintk("Device disabled\n");