linux-kernel - [PATCH 22/24] media: dw2102: return -EIO instead of -1 for mac address read errors

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Message-Id: <af920cd5eb144a10f7bf3baf9dc7dd8558707ff9.1684000646.git.mchehab@kernel.org>
Date:   Sat, 13 May 2023 18:57:39 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH 22/24] media: dw2102: return -EIO instead of -1 for mac address read errors

The dvb-usb core function only checks if the returned value is
zero, so it doesn't actually matter the error code. Still, returning
-1 as an error condition is something that we don't do upstream. So,
change the logic to return -EIO in case of I2C transfer failures.

Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
---
 drivers/media/usb/dvb-usb/dw2102.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/usb/dvb-usb/dw2102.c b/drivers/media/usb/dvb-usb/dw2102.c
index 2a048499468b..970b84c3f0b5 100644
--- a/drivers/media/usb/dvb-usb/dw2102.c
+++ b/drivers/media/usb/dvb-usb/dw2102.c
@@ -830,7 +830,7 @@ static int dw210x_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
 	for (i = 0; i < 256; i++) {
 		if (dw210x_op_rw(d->udev, 0xb6, 0xa0 , i, ibuf, 2, DW210X_READ_MSG) < 0) {
 			err("read eeprom failed.");
-			return -1;
+			return -EIO;
 		} else {
 			eepromline[i%16] = ibuf[0];
 			eeprom[i] = ibuf[0];
@@ -869,7 +869,7 @@ static int s6x0_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
 		ret = s6x0_i2c_transfer(&d->i2c_adap, msg, 2);
 		if (ret != 2) {
 			err("read eeprom failed.");
-			return -1;
+			return -EIO;
 		} else {
 			eepromline[i % 16] = ibuf[0];
 			eeprom[i] = ibuf[0];
@@ -946,7 +946,7 @@ static int su3000_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
 	for (i = 0; i < 6; i++) {
 		obuf[1] = 0xf0 + i;
 		if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
-			return -1;
+			return -EIO;
 		else
 			mac[i] = ibuf[0];
 	}
-- 
2.40.1