[PATCH] PATCH 2.5.10 usbnet, check_connect updates

USB usbnet driver update

The patch cleans up the handling of connection checking to
match the truth that it's effectively tristate (connected, not,
and can't know) vs binary ("connected" and "can't know"
as the same value, since it was OK to ifup).  Since ethtool
supports the tristate semantics, it matters now.

drivers/usb/net/usbnet.c

@@ -121,7 +121,7 @@
 #define	CONFIG_USB_PL2301
 
 
-#define DRIVER_VERSION		"06-Apr-2002"
+#define DRIVER_VERSION		"26-Apr-2002"
 
 /*-------------------------------------------------------------------------*/
 
@@ -484,14 +484,6 @@ static int genelink_free (struct usbnet *dev)
 	return 0;
 }
 
-#else
-
-static int genelink_check_connect (struct usbnet *dev)
-{
-	dbg ("%s: assuming peer is connected", dev->net.name);
-	return 0;
-}
-
 #endif
 
 // reset the device status
@@ -623,12 +615,15 @@ static const struct driver_info	genelink_info = {
 	description:	"Genesys GeneLink",
 	flags:		FLAG_FRAMING_GL | FLAG_NO_SETINT,
 	reset:		genelink_reset,
-	check_connect:	genelink_check_connect,
 	rx_fixup:	genelink_rx_fixup,
 	tx_fixup:	genelink_tx_fixup,
 
 	in: 1, out: 2,
 	epsize:	64,
+
+#ifdef	GENELINK_ACK
+	check_connect:	genelink_check_connect,
+#endif
 };
 
 #endif /* CONFIG_USB_GENESYS */
@@ -652,11 +647,15 @@ static const struct driver_info	genelink_info = {
  *
  *-------------------------------------------------------------------------*/
 
+static int linuxdev_check_connect (struct usbnet *dev)
+{
+	return 0;		// by definition, always connected
+}
 
 static const struct driver_info	linuxdev_info = {
 	description:	"Linux Device",
 	// no reset defined (yet?)
-	// no check_connect needed!
+	check_connect:	linuxdev_check_connect,
 	in: 2, out: 1,
 	epsize:	64,
 };
@@ -1169,21 +1168,11 @@ static int pl_reset (struct usbnet *dev)
 		PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
 }
 
-static int pl_check_connect (struct usbnet *dev)
-{
-	// FIXME test interrupt data PL_PEER_E bit
-	// plus, there's some handshake done by
-	// the prolific win32 driver... 
-	dbg ("%s: assuming peer is connected", dev->net.name);
-	return 0;
-}
-
 static const struct driver_info	prolific_info = {
 	description:	"Prolific PL-2301/PL-2302",
 	flags:		FLAG_NO_SETINT,
 		/* some PL-2302 versions seem to fail usb_set_interface() */
 	reset:		pl_reset,
-	check_connect:	pl_check_connect,
 
 	in: 3, out: 2,
 	epsize:	64,
@@ -1567,7 +1556,7 @@ static int usbnet_ethtool_ioctl (struct net_device *net, void *useraddr)
 		if (dev->driver_info->check_connect) {
 			struct ethtool_value	edata = { ETHTOOL_GLINK };
 
-			edata.data = dev->driver_info->check_connect (dev);
+			edata.data = dev->driver_info->check_connect (dev) == 0;
 			if (copy_to_user (useraddr, &edata, sizeof (edata)))
 				return -EFAULT;
 			return 0;