From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Mon, 27 Aug 2018 14:28:50 +0200
Subject: drm/i2c: tda9950: set MAX_RETRIES for errors only
Git-commit: e0dccce1193f87597548d0db6ecc942fb92c04cd
Patch-mainline: v4.19-rc7
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

The CEC_TX_STATUS_MAX_RETRIES should be set for errors only to
prevent the CEC framework from retrying the transmit. If the
transmit was successful, then don't set this flag.

Found by running 'cec-compliance -A' on a beaglebone box.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/i2c/tda9950.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/i2c/tda9950.c
+++ b/drivers/gpu/drm/i2c/tda9950.c
@@ -191,7 +191,8 @@ static irqreturn_t tda9950_irq(int irq,
 			break;
 		}
 		/* TDA9950 executes all retries for us */
-		tx_status |= CEC_TX_STATUS_MAX_RETRIES;
+		if (tx_status != CEC_TX_STATUS_OK)
+			tx_status |= CEC_TX_STATUS_MAX_RETRIES;
 		cec_transmit_done(priv->adap, tx_status, arb_lost_cnt,
 				  nack_cnt, 0, err_cnt);
 		break;