From 762d0762b9bb055962526c5fdd71a28d371c3df3 Mon Sep 17 00:00:00 2001
From: Oleh Kravchenko <oleg@kaa.org.ua>
Date: Sat, 7 Oct 2017 22:37:46 +0000
Subject: [PATCH] cx231xx: Fix I2C on Internal Master 3 Bus

[ Upstream commit 6c5da8031a3abfad259190d35f83d89568b72ee2 ]

Internal Master 3 Bus can send and receive only 4 bytes per time.

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/usb/cx231xx/cx231xx-core.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c
index 19b0293312a0..07670117f922 100644
--- a/drivers/media/usb/cx231xx/cx231xx-core.c
+++ b/drivers/media/usb/cx231xx/cx231xx-core.c
@@ -356,7 +356,12 @@ int cx231xx_send_vendor_cmd(struct cx231xx *dev,
 	 */
 	if ((ven_req->wLength > 4) && ((ven_req->bRequest == 0x4) ||
 					(ven_req->bRequest == 0x5) ||
-					(ven_req->bRequest == 0x6))) {
+					(ven_req->bRequest == 0x6) ||
+
+					/* Internal Master 3 Bus can send
+					 * and receive only 4 bytes per time
+					 */
+					(ven_req->bRequest == 0x2))) {
 		unsend_size = 0;
 		pdata = ven_req->pBuff;