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>
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index ee2eac3..fed22ff 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -435,28 +435,6 @@
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 @@
}
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;