net: dsa: Fix off-by-one in switch address parsing

cd->sw_addr is used as a MDIO bus address, which cannot exceed
PHY_MAX_ADDR (32), our check was off-by-one.

Fixes: 5e95329b701c ("dsa: add device tree bindings to register DSA switches")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 52beeb8829dc55fbf73785e851fc2da1b5b58fac..b445d492c115382b9ecd25cbceb3e47053263387 100644 (file)
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -630,7 +630,7 @@ static int dsa_of_probe(struct device *dev)
                        continue;
 
                cd->sw_addr = be32_to_cpup(sw_addr);
-               if (cd->sw_addr > PHY_MAX_ADDR)
+               if (cd->sw_addr >= PHY_MAX_ADDR)
                        continue;
 
                if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))