smsc75xx: mark link down on startup and let PHY interrupt deal with carrier changes

This patch fixes the same issue as reported on smsc95xx, where the
usb device is connected with no ethernet cable plugged-in.

Without this patch sysfs reports the cable as present

flag@flag-desktop:~$ cat /sys/class/net/eth0/carrier
1

while it's not:

flag@flag-desktop:~$ sudo mii-tool eth0
eth0: no link

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

diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index a2349483cd2ab1d36ac9eb5a192215ad23d93ba2..b1b4649802aaad67f8ae71fbd8e4f77a36b7e142 100644 (file)
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -1212,7 +1212,7 @@ static const struct driver_info smsc75xx_info = {
        .rx_fixup       = smsc75xx_rx_fixup,
        .tx_fixup       = smsc75xx_tx_fixup,
        .status         = smsc75xx_status,
-       .flags          = FLAG_ETHER | FLAG_SEND_ZLP,
+       .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
 };
 
 static const struct usb_device_id products[] = {