net: Refactor full duplex flow control resolution

These 4 drivers have identical full duplex flow control resolution
functions.  This patch changes them all to use one common function.

The function in question decides whether a device should enable TX and
RX flow control in a standard way (IEEE 802.3-2005 table 28B-3), so this
should also be useful for other drivers.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 23 deletions

diff --git a/drivers/net/smsc9420.c b/drivers/net/smsc9420.c
index bc9879d5f281..940220f60921 100644
--- a/drivers/net/smsc9420.c
+++ b/drivers/net/smsc9420.c
@@ -1080,28 +1080,6 @@ static void smsc9420_set_multicast_list(struct net_device *dev)
         smsc9420_pci_flush_write(pd);
 }
 
-static u8 smsc9420_resolve_flowctrl_fulldplx(u16 lcladv, u16 rmtadv)
-{
-        u8 cap = 0;
-
-        if (lcladv & ADVERTISE_PAUSE_CAP) {
-                if (lcladv & ADVERTISE_PAUSE_ASYM) {
-                        if (rmtadv & LPA_PAUSE_CAP)
-                                cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
-                        else if (rmtadv & LPA_PAUSE_ASYM)
-                                cap = FLOW_CTRL_RX;
-                } else {
-                        if (rmtadv & LPA_PAUSE_CAP)
-                                cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
-                }
-        } else if (lcladv & ADVERTISE_PAUSE_ASYM) {
-                if ((rmtadv & LPA_PAUSE_CAP) && (rmtadv & LPA_PAUSE_ASYM))
-                        cap = FLOW_CTRL_TX;
-        }
-
-        return cap;
-}
-
 static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd)
 {
         struct phy_device *phy_dev = pd->phy_dev;
@@ -1110,7 +1088,7 @@ static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd)
         if (phy_dev->duplex == DUPLEX_FULL) {
                 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
                 u16 rmtadv = phy_read(phy_dev, MII_LPA);
-                u8 cap = smsc9420_resolve_flowctrl_fulldplx(lcladv, rmtadv);
+                u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 
                 if (cap & FLOW_CTRL_RX)
                         flow = 0xFFFF0002;