1 files changed, 39 insertions, 7 deletions

diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c
index ef4c117ea35f..6e9afe26db89 100644
--- a/drivers/macintosh/adbhid.c
+++ b/drivers/macintosh/adbhid.c
@@ -219,11 +219,12 @@ struct adbhid {
         int flags;
 };
 
-#define FLAG_FN_KEY_PRESSED     0x00000001
-#define FLAG_POWER_FROM_FN      0x00000002
-#define FLAG_EMU_FWDEL_DOWN     0x00000004
-#define FLAG_CAPSLOCK_TRANSLATE 0x00000008
-#define FLAG_CAPSLOCK_DOWN      0x00000010
+#define FLAG_FN_KEY_PRESSED             0x00000001
+#define FLAG_POWER_FROM_FN              0x00000002
+#define FLAG_EMU_FWDEL_DOWN             0x00000004
+#define FLAG_CAPSLOCK_TRANSLATE         0x00000008
+#define FLAG_CAPSLOCK_DOWN              0x00000010
+#define FLAG_CAPSLOCK_IGNORE_NEXT       0x00000020
 
 static struct adbhid *adbhid[16];
 
@@ -291,8 +292,15 @@ adbhid_input_keycode(int id, int scancode, int repeat)
                 if (keycode == ADB_KEY_CAPSLOCK && !up_flag) {
                         /* Key pressed, turning on the CapsLock LED.
                          * The next 0xff will be interpreted as a release. */
-                        ahid->flags |= FLAG_CAPSLOCK_TRANSLATE
+                        if (ahid->flags & FLAG_CAPSLOCK_IGNORE_NEXT) {
+                                /* Throw away this key event if it happens
+                                 * just after resume. */
+                                ahid->flags &= ~FLAG_CAPSLOCK_IGNORE_NEXT;
+                                return;
+                        } else {
+                                ahid->flags |= FLAG_CAPSLOCK_TRANSLATE
                                         | FLAG_CAPSLOCK_DOWN;
+                        }
                 } else if (scancode == 0xff) {
                         /* Scancode 0xff usually signifies that the capslock
                          * key was either pressed or released. */
@@ -681,6 +689,21 @@ static int adbhid_kbd_event(struct input_dev *dev, unsigned int type, unsigned i
         return -1;
 }
 
+static void
+adbhid_kbd_capslock_remember(void)
+{
+        struct adbhid *ahid;
+        int i;
+
+        for (i = 1; i < 16; i++) {
+                ahid = adbhid[i];
+
+                if (ahid && ahid->id == ADB_KEYBOARD)
+                        if (ahid->flags & FLAG_CAPSLOCK_TRANSLATE)
+                                ahid->flags |= FLAG_CAPSLOCK_IGNORE_NEXT;
+        }
+}
+
 static int
 adb_message_handler(struct notifier_block *this, unsigned long code, void *x)
 {
@@ -697,8 +720,17 @@ adb_message_handler(struct notifier_block *this, unsigned long code, void *x)
                 }
 
                 /* Stop pending led requests */
-                while(leds_req_pending)
+                while (leds_req_pending)
                         adb_poll();
+
+                /* After resume, and if the capslock LED is on, the PMU will
+                 * send a "capslock down" key event. This confuses the
+                 * restore_capslock_events logic. Remember if the capslock
+                 * LED was on before suspend so the unwanted key event can
+                 * be ignored after resume. */
+                if (restore_capslock_events)
+                        adbhid_kbd_capslock_remember();
+
                 break;
 
         case ADB_MSG_POST_RESET: