net/mlx4_core: Fix VF overwrite of module param which disables DMFS o…

…n new probed PFs

[ Upstream commit 95f1ba9 ]

In the VF driver, module parameter mlx4_log_num_mgm_entry_size was
mistakenly overwritten -- and in a manner which overrode the
device-managed flow steering option encoded in the parameter.

log_num_mgm_entry_size is a global module parameter which
affects all ConnectX-3 PFs installed on that host.
If a VF changes log_num_mgm_entry_size, this will affect all PFs
which are probed subsequent to the change (by disabling DMFS for
those PFs).

Fixes: 3c439b5 ("mlx4_core: Allow choosing flow steering mode")
Signed-off-by: Majd Dibbiny <[email protected]>
Reviewed-by: Jack Morgenstein <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/net/ethernet/mellanox/mlx4/main.c

@@ -841,8 +841,6 @@ static int mlx4_slave_cap(struct mlx4_dev *dev)
 		return -ENOSYS;
 	}
 
-	mlx4_log_num_mgm_entry_size = hca_param.log_mc_entry_sz;
-
 	dev->caps.hca_core_clock = hca_param.hca_core_clock;
 
 	memset(&dev_cap, 0, sizeof(dev_cap));