ethtool: Clean up definitions of rule location arrays in RX NFC

Correct the description of ethtool_rxnfc::rule_locs; it is an array
of currently used locations, not all possible valid locations.

Add note that drivers must not use ethtool_rxnfc::rule_locs.

The rule_locs argument to ethtool_ops::get_rxnfc is either NULL or a
pointer to an array of u32, so change the parameter type accordingly.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index cad58f26c47..5e1e1d2748a 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -7303,7 +7303,7 @@ static int niu_get_ethtool_tcam_all(struct niu *np,
 }
 
 static int niu_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
-                       void *rule_locs)
+                       u32 *rule_locs)
 {
         struct niu *np = netdev_priv(dev);
         int ret = 0;
@@ -7322,7 +7322,7 @@ static int niu_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
                 ret = niu_get_ethtool_tcam_entry(np, cmd);
                 break;
         case ETHTOOL_GRXCLSRLALL:
-                ret = niu_get_ethtool_tcam_all(np, cmd, (u32 *)rule_locs);
+                ret = niu_get_ethtool_tcam_all(np, cmd, rule_locs);
                 break;
         default:
                 ret = -EINVAL;