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/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index ee2eac3047b3..fed22ffedd57 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -435,28 +435,6 @@ static void smsc95xx_set_multicast(struct net_device *netdev)
         smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
 }
 
-static u8 smsc95xx_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 smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
                                             u16 lcladv, u16 rmtadv)
 {
@@ -469,7 +447,7 @@ static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
         }
 
         if (duplex == DUPLEX_FULL) {
-                u8 cap = smsc95xx_resolve_flowctrl_fulldplx(lcladv, rmtadv);
+                u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 
                 if (cap & FLOW_CTRL_RX)
                         flow = 0xFFFF0002;