From: Sean Young <sean@mess.org>
Date: Thu, 10 May 2018 10:14:38 +0000 (-0400)
Subject: media: rc: decoders do not need to check for transitions
X-Git-Tag: android-x86-8.1-r1~932^2~130
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=09161a05528005b061f07f4e55b42ad558118b9f;p=android-x86%2Fkernel.git

media: rc: decoders do not need to check for transitions

Drivers should never produce consecutive pulse or space raw events. Should
that occur, we would have bigger problems than this code is trying to
guard against.

Note that we already log an error should a driver misbehave.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---

diff --git a/drivers/media/rc/ir-mce_kbd-decoder.c b/drivers/media/rc/ir-mce_kbd-decoder.c
index 9574c3dd90f2..64ea42927669 100644
--- a/drivers/media/rc/ir-mce_kbd-decoder.c
+++ b/drivers/media/rc/ir-mce_kbd-decoder.c
@@ -274,9 +274,6 @@ again:
 		return 0;
 
 	case STATE_HEADER_BIT_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev))
-			break;
-
 		decrease_duration(&ev, MCIR2_BIT_END);
 
 		if (data->count != MCIR2_HEADER_NBITS) {
@@ -313,9 +310,6 @@ again:
 		return 0;
 
 	case STATE_BODY_BIT_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev))
-			break;
-
 		if (data->count == data->wanted_bits)
 			data->state = STATE_FINISHED;
 		else
diff --git a/drivers/media/rc/ir-rc5-decoder.c b/drivers/media/rc/ir-rc5-decoder.c
index cbfaadbee8fa..63624654a71e 100644
--- a/drivers/media/rc/ir-rc5-decoder.c
+++ b/drivers/media/rc/ir-rc5-decoder.c
@@ -88,9 +88,6 @@ again:
 		return 0;
 
 	case STATE_BIT_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev))
-			break;
-
 		if (data->count == CHECK_RC5X_NBITS)
 			data->state = STATE_CHECK_RC5X;
 		else
diff --git a/drivers/media/rc/ir-rc6-decoder.c b/drivers/media/rc/ir-rc6-decoder.c
index 66e07109f6fc..68487ce9f79b 100644
--- a/drivers/media/rc/ir-rc6-decoder.c
+++ b/drivers/media/rc/ir-rc6-decoder.c
@@ -145,9 +145,6 @@ again:
 		return 0;
 
 	case STATE_HEADER_BIT_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev))
-			break;
-
 		if (data->count == RC6_HEADER_NBITS)
 			data->state = STATE_TOGGLE_START;
 		else
@@ -165,10 +162,6 @@ again:
 		return 0;
 
 	case STATE_TOGGLE_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev) ||
-		    !geq_margin(ev.duration, RC6_TOGGLE_END, RC6_UNIT / 2))
-			break;
-
 		if (!(data->header & RC6_STARTBIT_MASK)) {
 			dev_dbg(&dev->dev, "RC6 invalid start bit\n");
 			break;
@@ -210,9 +203,6 @@ again:
 		break;
 
 	case STATE_BODY_BIT_END:
-		if (!is_transition(&ev, &dev->raw->prev_ev))
-			break;
-
 		if (data->count == data->wanted_bits)
 			data->state = STATE_FINISHED;
 		else