net/mlx5: fs, Fix inverted cap check in tx flow table root disconnect

[ Upstream commit 2610a3d ]

The capability check for reset_root_to_default was inverted, causing
the function to return -EOPNOTSUPP when the capability IS supported,
rather than when it is NOT supported.

Fix the capability check condition.

Fixes: 3c9c34c ("net/mlx5: fs, Command to control TX flow table root")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1769503961-124173-2-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: shayshyi

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

@@ -1167,7 +1167,8 @@ int mlx5_fs_cmd_set_tx_flow_table_root(struct mlx5_core_dev *dev, u32 ft_id, boo
 	u32 out[MLX5_ST_SZ_DW(set_flow_table_root_out)] = {};
 	u32 in[MLX5_ST_SZ_DW(set_flow_table_root_in)] = {};
 
-	if (disconnect && MLX5_CAP_FLOWTABLE_NIC_TX(dev, reset_root_to_default))
+	if (disconnect &&
+	    !MLX5_CAP_FLOWTABLE_NIC_TX(dev, reset_root_to_default))
 		return -EOPNOTSUPP;
 
 	MLX5_SET(set_flow_table_root_in, in, opcode,