[PATCH 3/4] net: ksz9477: propagate phy read error

[Gerald Loacker <gerald.loacker@wolfvision.net>]

In case of an error we should not return an arbitrary value, propagate the
error code instead.
Fix return value in case of address error.

Signed-off-by: Gerald Loacker <gerald.loacker@wolfvision.net>
---
 drivers/net/ksz9477.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ksz9477.c b/drivers/net/ksz9477.c
index 9665e0f723..d664b7cf01 100644
--- a/drivers/net/ksz9477.c
+++ b/drivers/net/ksz9477.c
@@ -29,14 +29,15 @@ static int ksz9477_phy_read16(struct dsa_switch *ds, int addr, int reg)
 {
 	struct device *dev = ds->dev;
 	struct ksz_switch *priv = dev_get_priv(dev);
-	u16 val = 0xffff;
+	u16 val;
+	int ret;
 
 	if (addr >= priv->phy_port_cnt)
-		return val;
+		return -EINVAL;
 
-	ksz_pread16(priv, addr, 0x100 + (reg << 1), &val);
+	ret = ksz_pread16(priv, addr, 0x100 + (reg << 1), &val);
 
-	return val;
+	return (ret < 0) ? ret : val;
 }
 
 static int ksz9477_phy_write16(struct dsa_switch *ds, int addr, int reg,

-- 
2.37.2