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, 1 insertions, 1 deletions

diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 93f1fb99432d..9536925f5bdd 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -824,7 +824,7 @@ static int efx_ethtool_reset(struct net_device *net_dev, u32 *flags)
 
 static int
 efx_ethtool_get_rxnfc(struct net_device *net_dev,
-                      struct ethtool_rxnfc *info, void *rules __always_unused)
+                      struct ethtool_rxnfc *info, u32 *rules __always_unused)
 {
         struct efx_nic *efx = netdev_priv(net_dev);