realtek: mdio: avoid access to uninitialized variable

The read functions might fail and thus "val" might be uninitialized.
The debug function will output the undefined state. Set the value
to zero to be consistent.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/23204
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/realtek/files-6.18/drivers/net/mdio/mdio-realtek-otto.c b/target/linux/realtek/files-6.18/drivers/net/mdio/mdio-realtek-otto.c
index 0e10720b491b68d0f66a8beaf51c88d7b2b82c8a..dbad94845527acd84a84a1f0ba91a2ca9852b5e3 100644 (file)
--- a/target/linux/realtek/files-6.18/drivers/net/mdio/mdio-realtek-otto.c
+++ b/target/linux/realtek/files-6.18/drivers/net/mdio/mdio-realtek-otto.c
@@ -513,7 +513,7 @@ static int rtmdio_931x_write_c45(struct mii_bus *bus, u32 pn, u32 devnum, u32 re
 static int rtmdio_read_c45(struct mii_bus *bus, int phy, int devnum, int regnum)
 {
        struct rtmdio_ctrl *ctrl = rtmdio_ctrl_from_bus(bus);
-       int ret, val, pn;
+       int ret, pn, val = 0;
 
        pn = rtmdio_phy_to_port(bus, phy);
        if (pn < 0)
@@ -530,7 +530,7 @@ static int rtmdio_read_c45(struct mii_bus *bus, int phy, int devnum, int regnum)
 static int rtmdio_read_c22(struct mii_bus *bus, int phy, int regnum)
 {
        struct rtmdio_ctrl *ctrl = rtmdio_ctrl_from_bus(bus);
-       int ret, val, pn;
+       int ret, pn, val = 0;
 
        pn = rtmdio_phy_to_port(bus, phy);
        if (pn < 0)