[04/19] Input: Make sure we follow all EV_KEY events

Commit Message

Henrik Rydberg Aug. 12, 2012, 9:42 p.m. UTC

For some EV_KEY types, sending a larger-than-one value causes the
input state to oscillate. This patch makes sure this cannot happen,
clearing up the autorepeat bypass logic in the process.

Signed-off-by: Henrik Rydberg <[e-mail]>
---
 drivers/input/input.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 8ebf116..4d64500 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -239,24 +239,30 @@  static void input_handle_event(struct input_dev *dev,
 		break;
 
 	case EV_KEY:
-		if (is_event_supported(code, dev->keybit, KEY_MAX) &&
-		    !!test_bit(code, dev->key) != value) {
+		if (is_event_supported(code, dev->keybit, KEY_MAX)) {
+
+			/* auto-repeat bypasses state updates */
+			if (value == 2) {
+				disposition = INPUT_PASS_TO_HANDLERS;
+				break;
+			}
+
+			if (!!test_bit(code, dev->key) != !!value) {
 
-			if (value != 2) {
 				__change_bit(code, dev->key);
+				disposition = INPUT_PASS_TO_HANDLERS;
+
 				if (value)
 					input_start_autorepeat(dev, code);
 				else
 					input_stop_autorepeat(dev);
 			}
-
-			disposition = INPUT_PASS_TO_HANDLERS;
 		}
 		break;
 
 	case EV_SW:
 		if (is_event_supported(code, dev->swbit, SW_MAX) &&
-		    !!test_bit(code, dev->sw) != value) {
+		    !!test_bit(code, dev->sw) != !!value) {
 
 			__change_bit(code, dev->sw);
 			disposition = INPUT_PASS_TO_HANDLERS;
@@ -283,7 +289,7 @@  static void input_handle_event(struct input_dev *dev,
 
 	case EV_LED:
 		if (is_event_supported(code, dev->ledbit, LED_MAX) &&
-		    !!test_bit(code, dev->led) != value) {
+		    !!test_bit(code, dev->led) != !!value) {
 
 			__change_bit(code, dev->led);
 			disposition = INPUT_PASS_TO_ALL;