Re: [PATCH net-next RFC v1 2/4] net: dsa: Add devlink port regions support to DSA

[Vladimir Oltean <vladimir.oltean@nxp.com>]

On Sat, Sep 19, 2020 at 04:43:30PM +0200, Andrew Lunn wrote:
> Allow DSA drivers to make use of devlink port regions, via simple
> wrappers.
> 
> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> ---
>  include/net/dsa.h  |  5 +++++
>  net/core/devlink.c |  3 +--
>  net/dsa/dsa.c      | 14 ++++++++++++++
>  3 files changed, 20 insertions(+), 2 deletions(-)
> 
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index d16057c5987a..01da896b2998 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -665,6 +665,11 @@ struct devlink_region *
>  dsa_devlink_region_create(struct dsa_switch *ds,
>  			  const struct devlink_region_ops *ops,
>  			  u32 region_max_snapshots, u64 region_size);
> +struct devlink_region *
> +dsa_devlink_port_region_create(struct dsa_switch *ds,
> +			       int port,
> +			       const struct devlink_port_region_ops *ops,
> +			       u32 region_max_snapshots, u64 region_size);
>  void dsa_devlink_region_destroy(struct devlink_region *region);
>  
>  struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
> diff --git a/net/core/devlink.c b/net/core/devlink.c
> index 66469cdcdc1e..4701ec17f3da 100644
> --- a/net/core/devlink.c
> +++ b/net/core/devlink.c
> @@ -4292,7 +4292,6 @@ static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg,
>  	}
>  
>  out:
> -	mutex_unlock(&devlink_mutex);

This diff is probably not intended?

>  	return err;
>  }
>  
> @@ -4330,7 +4329,7 @@ static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
>  	}
>  
>  out:
> -	mutex_unlock(&devlink_mutex);
> +	mutex_unlock(&devlink->lock);

Similar here.

>  	return err;
>  }
>  
> diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
> index 5c18c0214aac..97fcabdeccec 100644
> --- a/net/dsa/dsa.c
> +++ b/net/dsa/dsa.c
> @@ -414,6 +414,20 @@ dsa_devlink_region_create(struct dsa_switch *ds,
>  }
>  EXPORT_SYMBOL_GPL(dsa_devlink_region_create);
>  
> +struct devlink_region *
> +dsa_devlink_port_region_create(struct dsa_switch *ds,
> +			       int port,
> +			       const struct devlink_port_region_ops *ops,
> +			       u32 region_max_snapshots, u64 region_size)
> +{
> +	struct dsa_port *dp = dsa_to_port(ds, port);
> +
> +	return devlink_port_region_create(&dp->devlink_port, ops,
> +					  region_max_snapshots,
> +					  region_size);
> +}
> +EXPORT_SYMBOL_GPL(dsa_devlink_port_region_create);
> +
>  void dsa_devlink_region_destroy(struct devlink_region *region)
>  {
>  	devlink_region_destroy(region);
> -- 
> 2.28.0
> 

Thanks,
-Vladimir