From: Oleh Kravchenko <oleg@kaa.org.ua>
Date: Sat, 7 Oct 2017 22:38:00 +0000 (+0000)
Subject: cx231xx: Fix I2C on Internal Master 3 Bus
X-Git-Tag: v3.18.80~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e79412f61f0e9536d347ac8501f4104e340bc4f7;p=thirdparty%2Fkernel%2Fstable.git

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>
---

diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c
index 180103e480367..6ec0ac8a737e8 100644
--- a/drivers/media/usb/cx231xx/cx231xx-core.c
+++ b/drivers/media/usb/cx231xx/cx231xx-core.c
@@ -365,7 +365,12 @@ 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;