The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 174941ed28a3573db075da46d95b4dcf9d4c49c2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '167930400918528@kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
174941ed28a3 ("interconnect: qcom: osm-l3: fix registration race") f221bd781f25 ("interconnect: osm-l3: Ignore return value of icc_provider_del() in .remove()")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 174941ed28a3573db075da46d95b4dcf9d4c49c2 Mon Sep 17 00:00:00 2001 From: Johan Hovold johan+linaro@kernel.org Date: Mon, 6 Mar 2023 08:56:33 +0100 Subject: [PATCH] interconnect: qcom: osm-l3: fix registration race
The current interconnect provider registration interface is inherently racy as nodes are not added until the after adding the provider. This can specifically cause racing DT lookups to fail:
of_icc_xlate_onecell: invalid index 0 cpu cpu0: error -EINVAL: error finding src node cpu cpu0: dev_pm_opp_of_find_icc_paths: Unable to get path0: -22 qcom-cpufreq-hw: probe of 18591000.cpufreq failed with error -22
Switch to using the new API where the provider is not registered until after it has been fully initialised.
Fixes: 5bc9900addaf ("interconnect: qcom: Add OSM L3 interconnect provider support") Cc: stable@vger.kernel.org # 5.7 Reviewed-by: Konrad Dybcio konrad.dybcio@linaro.org Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20230306075651.2449-6-johan+linaro@kernel.org Signed-off-by: Georgi Djakov djakov@kernel.org
diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c index 1bc01ff6e02a..1bafb54f1432 100644 --- a/drivers/interconnect/qcom/osm-l3.c +++ b/drivers/interconnect/qcom/osm-l3.c @@ -158,8 +158,8 @@ static int qcom_osm_l3_remove(struct platform_device *pdev) { struct qcom_osm_l3_icc_provider *qp = platform_get_drvdata(pdev);
+ icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); - icc_provider_del(&qp->provider);
return 0; } @@ -245,14 +245,9 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) provider->set = qcom_osm_l3_set; provider->aggregate = icc_std_aggregate; provider->xlate = of_icc_xlate_onecell; - INIT_LIST_HEAD(&provider->nodes); provider->data = data;
- ret = icc_provider_add(provider); - if (ret) { - dev_err(&pdev->dev, "error adding interconnect provider\n"); - return ret; - } + icc_provider_init(provider);
for (i = 0; i < num_nodes; i++) { size_t j; @@ -275,12 +270,15 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) } data->num_nodes = num_nodes;
+ ret = icc_provider_register(provider); + if (ret) + goto err; + platform_set_drvdata(pdev, qp);
return 0; err: icc_nodes_remove(provider); - icc_provider_del(provider);
return ret; }