1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index fb45f5ee8df1..454970d2d701 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -746,7 +746,9 @@ static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
                         return AE_BAD_PARAMETER;
                 if (quirks->mailled == 1) {
                         param = value ? 0x92 : 0x93;
+                        i8042_lock_chip();
                         i8042_command(&param, 0x1059);
+                        i8042_unlock_chip();
                         return 0;
                 }
                 break;