net/mlx5e: Fix arch depending casting issue in FEC

Change type of active_fec to u32 to match the type expected by
mlx5e_get_fec_mode. Copy active_fec and configured_fec values to
unsigned long before preforming bitwise manipulations.
Take the same approach when configuring FEC over 50G link modes: copy
the policy into an unsigned long and only than preform bitwise
operations.

Fixes: 2132b71f ("net/mlx5e: Advertise globaly supported FEC modes")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en/port.c

@@ -371,12 +371,14 @@ enum mlx5e_fec_supported_link_mode {
 
 #define MLX5E_FEC_OVERRIDE_ADMIN_50G_POLICY(buf, policy, write, link)			\
 	do {										\
+		unsigned long policy_long;						\
 		u16 *__policy = &(policy);						\
 		bool _write = (write);							\
 											\
+		policy_long = *__policy;						\
 		if (_write && *__policy)						\
-			*__policy = find_first_bit((u_long *)__policy,		\
-						   sizeof(u16) * BITS_PER_BYTE);\
+			*__policy = find_first_bit(&policy_long,			\
+						   sizeof(policy_long) * BITS_PER_BYTE);\
 		MLX5E_FEC_OVERRIDE_ADMIN_POLICY(buf, *__policy, _write, link);		\
 		if (!_write && *__policy)						\
 			*__policy = 1 << *__policy;					\

drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c

@@ -665,11 +665,12 @@ static const u32 pplm_fec_2_ethtool_linkmodes[] = {
 static int get_fec_supported_advertised(struct mlx5_core_dev *dev,
 					struct ethtool_link_ksettings *link_ksettings)
 {
-	u_long active_fec = 0;
+	unsigned long active_fec_long;
+	u32 active_fec;
 	u32 bitn;
 	int err;
 
-	err = mlx5e_get_fec_mode(dev, (u32 *)&active_fec, NULL);
+	err = mlx5e_get_fec_mode(dev, &active_fec, NULL);
 	if (err)
 		return (err == -EOPNOTSUPP) ? 0 : err;
 
@@ -682,10 +683,11 @@ static int get_fec_supported_advertised(struct mlx5_core_dev *dev,
 	MLX5E_ADVERTISE_SUPPORTED_FEC(MLX5E_FEC_LLRS_272_257_1,
 				      ETHTOOL_LINK_MODE_FEC_LLRS_BIT);
 
+	active_fec_long = active_fec;
 	/* active fec is a bit set, find out which bit is set and
 	 * advertise the corresponding ethtool bit
 	 */
-	bitn = find_first_bit(&active_fec, sizeof(u32) * BITS_PER_BYTE);
+	bitn = find_first_bit(&active_fec_long, sizeof(active_fec_long) * BITS_PER_BYTE);
 	if (bitn < ARRAY_SIZE(pplm_fec_2_ethtool_linkmodes))
 		__set_bit(pplm_fec_2_ethtool_linkmodes[bitn],
 			  link_ksettings->link_modes.advertising);
@@ -1517,8 +1519,8 @@ static int mlx5e_get_fecparam(struct net_device *netdev,
 {
 	struct mlx5e_priv *priv = netdev_priv(netdev);
 	struct mlx5_core_dev *mdev = priv->mdev;
-	u16 fec_configured = 0;
-	u32 fec_active = 0;
+	u16 fec_configured;
+	u32 fec_active;
 	int err;
 
 	err = mlx5e_get_fec_mode(mdev, &fec_active, &fec_configured);
@@ -1526,14 +1528,14 @@ static int mlx5e_get_fecparam(struct net_device *netdev,
 	if (err)
 		return err;
 
-	fecparam->active_fec = pplm2ethtool_fec((u_long)fec_active,
-						sizeof(u32) * BITS_PER_BYTE);
+	fecparam->active_fec = pplm2ethtool_fec((unsigned long)fec_active,
+						sizeof(unsigned long) * BITS_PER_BYTE);
 
 	if (!fecparam->active_fec)
 		return -EOPNOTSUPP;
 
-	fecparam->fec = pplm2ethtool_fec((u_long)fec_configured,
-					 sizeof(u16) * BITS_PER_BYTE);
+	fecparam->fec = pplm2ethtool_fec((unsigned long)fec_configured,
+					 sizeof(unsigned long) * BITS_PER_BYTE);
 
 	return 0;
 }