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media: dvb: return -EREMOTEIO on i2c transfer failure.

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[ Upstream commit 96f3a9392799dd0f6472648a7366622ffd0989f3 ]

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.

If the transfer fails, an uninitialized value will be read from b2.

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@canonical.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2020-02-10 18:51:33 +01:00 committed by Greg Kroah-Hartman
parent ed251f4537
commit 4cb7b2a389
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/dvb-usb/dibusb-mb.c
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@ -84,7 +84,7 @@ 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)