linux-kernel - [PATCH] media: dvb: return -EREMOTEIO on i2c transfer failure.

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Message-Id: <20200210175133.479739-1-colin.king@canonical.com>
Date:   Mon, 10 Feb 2020 17:51:33 +0000
From:   Colin King <colin.king@...onical.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michael Krufky <mkrufky@...uxtv.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-media@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: dvb: return -EREMOTEIO on i2c transfer failure.

From: Colin Ian King <colin.king@...onical.com>

Currently when i2c transfers fail the error return -EREMOTEIO
is assigned to err but then later overwritten when the tuner
attach call is made.  Fix this by returning early with the
error return code -EREMOTEIO on i2c transfer failure errors.

Addresses-Coverity: ("Unused value")
Fixes: fbfee8684ff2 ("V4L/DVB (5651): Dibusb-mb: convert pll handling to properly use dvb-pll")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/media/usb/dvb-usb/dibusb-mb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/dvb-usb/dibusb-mb.c b/drivers/media/usb/dvb-usb/dibusb-mb.c
index d4ea72bf09c5..5131c8d4c632 100644
--- a/drivers/media/usb/dvb-usb/dibusb-mb.c
+++ b/drivers/media/usb/dvb-usb/dibusb-mb.c
@@ -81,7 +81,7 @@ static int dibusb_tuner_probe_and_attach(struct dvb_usb_adapter *adap)
 
 	if (i2c_transfer(&adap->dev->i2c_adap, msg, 2) != 2) {
 		err("tuner i2c write failed.");
-		ret = -EREMOTEIO;
+		return -EREMOTEIO;
 	}
 
 	if (adap->fe_adap[0].fe->ops.i2c_gate_ctrl)
-- 
2.25.0