linux-kernel - [PATCH 3.10 32/78] media: af9035: fix broken I2C and USB I/O

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Date:	Wed, 18 Dec 2013 13:11:00 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Antti Palosaari <crope@....fi>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [PATCH 3.10 32/78] media: af9035: fix broken I2C and USB I/O

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Antti Palosaari <crope@....fi>

commit 9323297dc0ea9141f8099e474657391bb3ad98f8 upstream.

There was three small buffer len calculation bugs which caused
driver non-working. These are coming from recent commit:
commit 7760e148350bf6df95662bc0db3734e9d991cb03
[media] af9035: Don't use dynamic static allocation

Signed-off-by: Antti Palosaari <crope@....fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/dvb-usb-v2/af9035.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/media/usb/dvb-usb-v2/af9035.c
+++ b/drivers/media/usb/dvb-usb-v2/af9035.c
@@ -130,7 +130,7 @@ static int af9035_wr_regs(struct dvb_usb
 {
 	u8 wbuf[MAX_XFER_SIZE];
 	u8 mbox = (reg >> 16) & 0xff;
-	struct usb_req req = { CMD_MEM_WR, mbox, sizeof(wbuf), wbuf, 0, NULL };
+	struct usb_req req = { CMD_MEM_WR, mbox, 6 + len, wbuf, 0, NULL };
 
 	if (6 + len > sizeof(wbuf)) {
 		dev_warn(&d->udev->dev, "%s: i2c wr: len=%d is too big!\n",
@@ -237,7 +237,7 @@ static int af9035_i2c_master_xfer(struct
 		} else {
 			/* I2C */
 			u8 buf[MAX_XFER_SIZE];
-			struct usb_req req = { CMD_I2C_RD, 0, sizeof(buf),
+			struct usb_req req = { CMD_I2C_RD, 0, 5 + msg[0].len,
 					buf, msg[1].len, msg[1].buf };
 
 			if (5 + msg[0].len > sizeof(buf)) {
@@ -273,8 +273,8 @@ static int af9035_i2c_master_xfer(struct
 		} else {
 			/* I2C */
 			u8 buf[MAX_XFER_SIZE];
-			struct usb_req req = { CMD_I2C_WR, 0, sizeof(buf), buf,
-					0, NULL };
+			struct usb_req req = { CMD_I2C_WR, 0, 5 + msg[0].len,
+					buf, 0, NULL };
 
 			if (5 + msg[0].len > sizeof(buf)) {
 				dev_warn(&d->udev->dev,


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