[IPoIB] add path record information in debugfs

Add ibX_path files to debugfs that contain information about the IPoIB
path cache.  IPoIB ARP only gives GIDs, which the IPoIB driver must
resolve to real IB paths through the ib_sa module.  For debugging,
when the ARP table looks OK but traffic isn't flowing, it's useful to
be able to see if the resolution from GID to path worked.

Also clean up the formatting of the existing _mcg debugfs files.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index 3ecf78a9493a..87096939e0b6 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -928,21 +928,16 @@ struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
                 return NULL;
 
         iter->dev = dev;
-        memset(iter->mgid.raw, 0, sizeof iter->mgid);
+        memset(iter->mgid.raw, 0, 16);
 
         if (ipoib_mcast_iter_next(iter)) {
-                ipoib_mcast_iter_free(iter);
+                kfree(iter);
                 return NULL;
         }
 
         return iter;
 }
 
-void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter)
-{
-        kfree(iter);
-}
-
 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
 {
         struct ipoib_dev_priv *priv = netdev_priv(iter->dev);