netdev - Re: [patch net-next 11/12] mlxsw: spectrum_dpipe: Add support for IPv4 host table dump

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Date:   Thu, 24 Aug 2017 12:26:35 -0700
From:   David Ahern <dsahern@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, arkadis@...lanox.com, idosch@...lanox.com,
        mlxsw@...lanox.com
Subject: Re: [patch net-next 11/12] mlxsw: spectrum_dpipe: Add support for
 IPv4 host table dump

On 8/23/17 11:40 PM, Jiri Pirko wrote:
> +static int
> +mlxsw_sp_dpipe_table_host_entries_get(struct mlxsw_sp *mlxsw_sp,
> +				      struct devlink_dpipe_entry *entry,
> +				      bool counters_enabled,
> +				      struct devlink_dpipe_dump_ctx *dump_ctx,
> +				      int type)
> +{
> +	int rif_neigh_count = 0;
> +	int rif_neigh_skip = 0;
> +	int neigh_count = 0;
> +	int rif_count;
> +	int i, j;
> +	int err;
> +
> +	rtnl_lock();

Why does a h/w driver dumping its tables need the rtnl lock?