[PATCH] Ignore garbage in dell-wmi events

[Mario Limonciello <mario_limonciello@xxxxxxxx>]

Hi:

In debugging with some future machines that actually contain BIOS level
support for dell-wmi, I've determined that the upper half of the data
that comes back from wmi_get_event_data may sometimes contain extra
information that isn't currently relevant when pulling scan codes out of
the data.  This causes dell-wmi to improperly respond to these events.

I'm attaching a patch (Exchange would munge up the line breaks otherwise).

Thanks,

-- 
Mario Limonciello
*Dell | Linux Engineering*
mario_limonciello@xxxxxxxx

--- a/drivers/platform/x86/dell-wmi.c~	2009-04-28 12:32:32.000000000 -0500
+++ b/drivers/platform/x86/dell-wmi.c	2009-04-28 12:33:02.000000000 -0500
@@ -182,7 +182,7 @@
 
 	if (obj && obj->type == ACPI_TYPE_BUFFER) {
 		int *buffer = (int *)obj->buffer.pointer;
-		key = dell_wmi_get_entry_by_scancode(buffer[1]);
+		key = dell_wmi_get_entry_by_scancode(0xFFFF & buffer[1]);
 		if (key) {
 			input_report_key(dell_wmi_input_dev, key->keycode, 1);
 			input_sync(dell_wmi_input_dev);
@@ -190,7 +190,7 @@
 			input_sync(dell_wmi_input_dev);
 		} else
 			printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
-			       buffer[1]);
+			       0xFFFF & buffer[1]);
 	}
 }

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