linux-kernel - Re: [PATCH v5 1/8] interconnect: Add generic on-chip interconnect API

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Date:   Wed, 27 Jun 2018 08:19:20 +0200
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Georgi Djakov <georgi.djakov@...aro.org>
Cc:     "open list:THERMAL" <linux-pm@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Rob Herring <robh+dt@...nel.org>,
        mturquette <mturquette@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Saravana Kannan <skannan@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Amit Kucheria <amit.kucheria@...aro.org>,
        "Sweeney, Sean" <seansw@....qualcomm.com>,
        daidavid1@...eaurora.org, Evan Green <evgreen@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        abailon@...libre.com, linux-kernel <linux-kernel@...r.kernel.org>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v5 1/8] interconnect: Add generic on-chip interconnect API

Hi Georgi

On Wed, 20 Jun 2018 at 14:11, Georgi Djakov <georgi.djakov@...aro.org> wrote:

[snip]

> +
> +static struct icc_path *path_allocate(struct icc_node *dst, ssize_t num_nodes)
> +{
> +       struct icc_node *node = dst;
> +       struct icc_path *path;
> +       size_t i;
> +
> +       path = kzalloc(sizeof(*path) + num_nodes * sizeof(*path->reqs),

Should be (num_nodes -1) * sizeof(*path->reqs) as there is already 1
icc_req in icc_path struct

> +                      GFP_KERNEL);
> +       if (!path)
> +               return ERR_PTR(-ENOMEM);
> +
> +       path->num_nodes = num_nodes;
> +
> +       for (i = 0; i < num_nodes; i++) {
> +               hlist_add_head(&path->reqs[i].req_node, &node->req_list);
> +
> +               path->reqs[i].node = node;
> +               /* reference to previous node was saved during path traversal */
> +               node = node->reverse;
> +       }
> +
> +       return path;
> +}
> +

[snip]