linux-kernel - Re: [PATCH 4/5] interconnect: Add a common helper for removing all nodes

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Message-ID: <20191128182004.GJ82109@yoga>
Date:   Thu, 28 Nov 2019 10:20:04 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Georgi Djakov <georgi.djakov@...aro.org>
Cc:     linux-pm@...r.kernel.org, agross@...nel.org, digetx@...il.com,
        evgreen@...omium.org, daidavid1@...eaurora.org,
        masneyb@...tation.org, sibis@...eaurora.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 4/5] interconnect: Add a common helper for removing all
 nodes

On Thu 28 Nov 05:34 PST 2019, Georgi Djakov wrote:

> The removal of all nodes from a provider seem to be a common functionality
> for all existing users and it would make sense to factor out this into a
> a common helper function.
> 
> Suggested-by: Dmitry Osipenko <digetx@...il.com>
> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  drivers/interconnect/core.c           | 22 ++++++++++++++++++++++
>  include/linux/interconnect-provider.h |  6 ++++++
>  2 files changed, 28 insertions(+)
> 
> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
> index 467c539310f3..0e4852feb395 100644
> --- a/drivers/interconnect/core.c
> +++ b/drivers/interconnect/core.c
> @@ -735,6 +735,28 @@ void icc_node_del(struct icc_node *node)
>  }
>  EXPORT_SYMBOL_GPL(icc_node_del);
>  
> +/**
> + * icc_nodes_remove() - remove all previously added nodes from provider
> + * @provider: the interconnect provider we are removing nodes from
> + *
> + * Return: 0 on success, or an error code otherwise
> + */
> +int icc_nodes_remove(struct icc_provider *provider)
> +{
> +	struct icc_node *n, *tmp;
> +
> +	if (WARN_ON(IS_ERR_OR_NULL(provider)))
> +		return -EINVAL;
> +
> +	list_for_each_entry_safe_reverse(n, tmp, &provider->nodes, node_list) {
> +		icc_node_del(n);
> +		icc_node_destroy(n->id);
> +	}
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(icc_nodes_remove);
> +
>  /**
>   * icc_provider_add() - add a new interconnect provider
>   * @provider: the interconnect provider that will be added into topology
> diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
> index b16f9effa555..31440c921216 100644
> --- a/include/linux/interconnect-provider.h
> +++ b/include/linux/interconnect-provider.h
> @@ -98,6 +98,7 @@ int icc_link_create(struct icc_node *node, const int dst_id);
>  int icc_link_destroy(struct icc_node *src, struct icc_node *dst);
>  void icc_node_add(struct icc_node *node, struct icc_provider *provider);
>  void icc_node_del(struct icc_node *node);
> +int icc_nodes_remove(struct icc_provider *provider);
>  int icc_provider_add(struct icc_provider *provider);
>  int icc_provider_del(struct icc_provider *provider);
>  
> @@ -130,6 +131,11 @@ void icc_node_del(struct icc_node *node)
>  {
>  }
>  
> +static inline int icc_nodes_remove(struct icc_provider *provider)
> +{
> +	return -ENOTSUPP;
> +}
> +
>  static inline int icc_provider_add(struct icc_provider *provider)
>  {
>  	return -ENOTSUPP;