net: bcmgenet: properly disable password matching

bcmgenet_set_wol() correctly sets MPD_PW_EN when a password is specified
to match magic packets against, however, when we switch from a
password-matching to a matching without password we would leave this bit
turned on, and GENET would only match magic packets with passwords.

This can be reproduced using the following sequence:

ethtool -s eth0 wol g
ethtool -s eth0 wol s sopass 00:11:22:33:44:55
ethtool -s eth0 wol g

The simple fix is to clear the MPD_PWD_EN bit when WAKE_MAGICSECURE is
not set.

Fixes: c51de7f3976b ("net: bcmgenet: add Wake-on-LAN support code")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c b/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
index 149a0d70c10883f3f769904ef6ae2ca6b2f66f8e..b97122926d3aa91210a8945d45f268d370c86ee4 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
@@ -73,15 +73,17 @@ int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
        if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE))
                return -EINVAL;
 
+       reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
        if (wol->wolopts & WAKE_MAGICSECURE) {
                bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
                                     UMAC_MPD_PW_MS);
                bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
                                     UMAC_MPD_PW_LS);
-               reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
                reg |= MPD_PW_EN;
-               bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
+       } else {
+               reg &= ~MPD_PW_EN;
        }
+       bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
 
        /* Flag the device and relevant IRQ as wakeup capable */
        if (wol->wolopts) {