[PATCH review for 4.9 24/50] [media] cx231xx: Fix I2C on Internal Master 3 Bus

[Levin, Alexander (Sasha Levin)]

From: Oleh Kravchenko <o...@kaa.org.ua>

[ Upstream commit 6c5da8031a3abfad259190d35f83d89568b72ee2 ]

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

Signed-off-by: Oleh Kravchenko <o...@kaa.org.ua>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 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 8b099fe1d592..71b65ab573ac 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;
 
-- 
2.11.0