Re: [PATCH] Work around asus_acpi driver oopses on Samsung P30s and the like due to the ACPI implicit return

[Alex Riesen]

FWIW, I need the patch below to stop ACPI freezing at boot on Asus S1300N.
There is a BIOS update from Asus, but no mention of any fixes in ACPI,
so as I have no means to backup the BIOS in case something goes wrong
I didn't do the update.

I found out (by putting printks in the initialization code) that a
call to INI (whatever it is) of VGA_ (whatever this is) immediately
freezes the notebook and the fan goes on shortly afterwards.


diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index f4c8775..d415b30 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -352,8 +352,8 @@ static struct model_data model_conf[END_
 	 .lcd_status = "\\BKLT",
 	 .brightness_set = "SPLV",
 	 .brightness_get = "GPLV",
-	 .display_set = "SDSP",
-	 .display_get = "\\ADVG"}
+	 /* .display_set = "SDSP",
+	 .display_get = "\\ADVG" */}
 };
 
 /* procdir we use */
diff --git a/drivers/acpi/namespace/nsinit.c b/drivers/acpi/namespace/nsinit.c
index 9f929e4..79fa2ec 100644
--- a/drivers/acpi/namespace/nsinit.c
+++ b/drivers/acpi/namespace/nsinit.c
@@ -384,7 +384,12 @@ acpi_ns_init_one_device(acpi_handle obj_
 	pinfo.parameters = NULL;
 	pinfo.parameter_type = ACPI_PARAM_ARGS;
 
-	status = acpi_ut_execute_STA(pinfo.node, &flags);
+	/* workaround Asus S1300N freeze at INI */
+	if ( memcmp(pinfo.node->name.ascii, "VGA_",4)==0 ) {
+	    printk(KERN_ERR "acpi: VGA_ ignored\n");
+	    status = AE_NOT_FOUND;
+	} else
+	    status = acpi_ut_execute_STA(pinfo.node, &flags);
 	if (ACPI_FAILURE(status)) {
 		/* Ignore error and move on to next device */
 
-
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