usb: plusb: Add debug to reset function

This patch adds some debug to the reset function to print out the
reason why it fails.

Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/usb/plusb.c b/drivers/net/usb/plusb.c
index f46aa07bfa69..217aec8a768f 100644
--- a/drivers/net/usb/plusb.c
+++ b/drivers/net/usb/plusb.c
@@ -94,11 +94,15 @@ pl_set_QuickLink_features(struct usbnet *dev, int val)
 
 static int pl_reset(struct usbnet *dev)
 {
+        int status;
+
         /* some units seem to need this reset, others reject it utterly.
          * FIXME be more like "naplink" or windows drivers.
          */
-        (void) pl_set_QuickLink_features(dev,
+        status = pl_set_QuickLink_features(dev,
                 PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
+        if (status != 0 && netif_msg_probe(dev))
+                netif_dbg(dev, link, dev->net, "pl_reset --> %d\n", status);
         return 0;
 }