linux-kernel - Re: [PATCH v2 1/5] interconnect: qcom: sdm845: Walk the list safely on node removal

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Message-ID: <20191202173650.GB133384@yoga>
Date:   Mon, 2 Dec 2019 09:36:50 -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 v2 1/5] interconnect: qcom: sdm845: Walk the list safely
 on node removal

On Mon 02 Dec 08:21 PST 2019, Georgi Djakov wrote:

> As we will remove items off the list using list_del(), we need to use the
> safe version of list_for_each_entry().
> 
> Fixes: b5d2f741077a ("interconnect: qcom: Add sdm845 interconnect provider driver")
> Reported-by: Dmitry Osipenko <digetx@...il.com>
> Signed-off-by: Georgi Djakov <georgi.djakov@...aro.org>

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

> ---
> v2:
> - Fix the number of parameters that got messed up. (Bjorn)
> 
>  drivers/interconnect/qcom/sdm845.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/interconnect/qcom/sdm845.c b/drivers/interconnect/qcom/sdm845.c
> index 502a6c22b41e..387267ee9648 100644
> --- a/drivers/interconnect/qcom/sdm845.c
> +++ b/drivers/interconnect/qcom/sdm845.c
> @@ -868,9 +868,9 @@ static int qnoc_remove(struct platform_device *pdev)
>  {
>  	struct qcom_icc_provider *qp = platform_get_drvdata(pdev);
>  	struct icc_provider *provider = &qp->provider;
> -	struct icc_node *n;
> +	struct icc_node *n, *tmp;
>  
> -	list_for_each_entry(n, &provider->nodes, node_list) {
> +	list_for_each_entry_safe(n, tmp, &provider->nodes, node_list) {
>  		icc_node_del(n);
>  		icc_node_destroy(n->id);
>  	}