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>

8 files changed, 14 insertions, 14 deletions

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
index 767c22983c1..ce14f11c0de 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
@@ -2241,7 +2241,7 @@ static int bnx2x_set_phys_id(struct net_device *dev,
 }
 
 static int bnx2x_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
-                           void *rules __always_unused)
+                           u32 *rules __always_unused)
 {
         struct bnx2x *bp = netdev_priv(dev);
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 90b4921cac9..40b395f932c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -1902,7 +1902,7 @@ static int set_rss_table(struct net_device *dev,
 }
 
 static int get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
-                     void *rules)
+                     u32 *rules)
 {
         const struct port_info *pi = netdev_priv(dev);
 
diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c
index 25a8c2adb00..42238301c42 100644
--- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
+++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
@@ -1712,7 +1712,7 @@ static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
 }
 
 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
-                void *rule_locs)
+                u32 *rule_locs)
 {
         struct gfar_private *priv = netdev_priv(dev);
         int ret = 0;
@@ -1728,7 +1728,7 @@ static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
                 ret = gfar_get_cls(priv, cmd);
                 break;
         case ETHTOOL_GRXCLSRLALL:
-                ret = gfar_get_cls_all(priv, cmd, (u32 *) rule_locs);
+                ret = gfar_get_cls_all(priv, cmd, rule_locs);
                 break;
         default:
                 ret = -EINVAL;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index 11e1d5cd40b..c0003babc06 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -2287,7 +2287,7 @@ static int ixgbe_get_ethtool_fdir_all(struct ixgbe_adapter *adapter,
 }
 
 static int ixgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
-                           void *rule_locs)
+                           u32 *rule_locs)
 {
         struct ixgbe_adapter *adapter = netdev_priv(dev);
         int ret = -EOPNOTSUPP;
@@ -2305,8 +2305,7 @@ static int ixgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
                 ret = ixgbe_get_ethtool_fdir_entry(adapter, cmd);
                 break;
         case ETHTOOL_GRXCLSRLALL:
-                ret = ixgbe_get_ethtool_fdir_all(adapter, cmd,
-                                                 (u32 *)rule_locs);
+                ret = ixgbe_get_ethtool_fdir_all(adapter, cmd, rule_locs);
                 break;
         default:
                 break;
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 93f1fb99432..9536925f5bd 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);
 
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;
diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
index 27400edeef5..e662cbc8bfb 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
@@ -558,7 +558,7 @@ out:
 
 static int
 vmxnet3_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
-                  void *rules)
+                  u32 *rules)
 {
         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
         switch (info->cmd) {
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index b5d189367a0..5d4a06accd8 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -479,7 +479,7 @@ struct ethtool_rx_flow_spec {
  * @data: Command-dependent value
  * @fs: Flow classification rule
  * @rule_cnt: Number of rules to be affected
- * @rule_locs: Array of valid rule locations
+ * @rule_locs: Array of used rule locations
  *
  * For %ETHTOOL_GRXFH and %ETHTOOL_SRXFH, @data is a bitmask indicating
  * the fields included in the flow hash, e.g. %RXH_IP_SRC.  The following
@@ -497,7 +497,8 @@ struct ethtool_rx_flow_spec {
  * For %ETHTOOL_GRXCLSRLALL, @rule_cnt specifies the array size of the
  * user buffer for @rule_locs on entry.  On return, @data is the size
  * of the rule table and @rule_locs contains the locations of the
- * defined rules.
+ * defined rules.  Drivers must use the second parameter to get_rxnfc()
+ * instead of @rule_locs.
  *
  * For %ETHTOOL_SRXCLSRLINS, @fs specifies the rule to add or update.
  * @fs.@location specifies the location to use and must not be ignored.
@@ -939,7 +940,7 @@ struct ethtool_ops {
         int     (*set_priv_flags)(struct net_device *, u32);
         int     (*get_sset_count)(struct net_device *, int);
         int     (*get_rxnfc)(struct net_device *,
-                             struct ethtool_rxnfc *, void *);
+                             struct ethtool_rxnfc *, u32 *rule_locs);
         int     (*set_rxnfc)(struct net_device *, struct ethtool_rxnfc *);
         int     (*flash_device)(struct net_device *, struct ethtool_flash *);
         int     (*reset)(struct net_device *, u32 *);