From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 3 Apr 2023 01:17:19 +0000 (+0100)
Subject: net: dsa: mt7530: make some noise if register read fails
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b6f56cddb5f57a0b8da0ce582232a2f1933558c6;p=linux.git

net: dsa: mt7530: make some noise if register read fails

Simply returning the negative error value instead of the read value
doesn't seem like a good idea. Return 0 instead and add WARN_ON_ONCE(1)
so this kind of error will not go unnoticed.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index a0d99af897ace..18d4aa6bb9968 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -224,9 +224,10 @@ mt7530_mii_read(struct mt7530_priv *priv, u32 reg)
 	/* MT7530 uses 31 as the pseudo port */
 	ret = bus->write(bus, 0x1f, 0x1f, page);
 	if (ret < 0) {
+		WARN_ON_ONCE(1);
 		dev_err(&bus->dev,
 			"failed to read mt7530 register\n");
-		return ret;
+		return 0;
 	}
 
 	lo = bus->read(bus, 0x1f, r);