From: Mario Limonciello <mario_limonciello@xxxxxxxx>
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.
Signed-off-by: Mario Limonciello <mario_limonciello@xxxxxxxx>
Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/platform/x86/dell-wmi.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN drivers/platform/x86/dell-wmi.c~dell-wmi-mask-off-upper-bytes-of-event-response drivers/platform/x86/dell-wmi.c
--- a/drivers/platform/x86/dell-wmi.c~dell-wmi-mask-off-upper-bytes-of-event-response
+++ a/drivers/platform/x86/dell-wmi.c
@@ -122,7 +122,12 @@ static void dell_wmi_notify(u32 value, v
if (obj && obj->type == ACPI_TYPE_BUFFER) {
int *buffer = (int *)obj->buffer.pointer;
- key = dell_wmi_get_entry_by_scancode(buffer[1]);
+ /*
+ * The upper bytes of the event may contain
+ * additional information, so mask them off for the
+ * scancode lookup
+ */
+ key = dell_wmi_get_entry_by_scancode(buffer[1] & 0xFFFF);
if (key) {
input_report_key(dell_wmi_input_dev, key->keycode, 1);
input_sync(dell_wmi_input_dev);
_
--
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