The patch below does not apply to the 5.10-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-5.10.y git checkout FETCH_HEAD git cherry-pick -x bfe7bcd2b9f5215de2144f097f39971180e7ea54 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '167930408724934@kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^..
Possible dependencies:
bfe7bcd2b9f5 ("interconnect: qcom: msm8974: fix registration race") 919d4e1a207e ("interconnect: msm8974: Ignore return value of icc_provider_del() in .remove()")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From bfe7bcd2b9f5215de2144f097f39971180e7ea54 Mon Sep 17 00:00:00 2001 From: Johan Hovold johan+linaro@kernel.org Date: Mon, 6 Mar 2023 08:56:39 +0100 Subject: [PATCH] interconnect: qcom: msm8974: 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.
Switch to using the new API where the provider is not registered until after it has been fully initialised.
Fixes: 4e60a9568dc6 ("interconnect: qcom: add msm8974 driver") Cc: stable@vger.kernel.org # 5.5 Reviewed-by: Brian Masney bmasney@redhat.com Reviewed-by: Konrad Dybcio konrad.dybcio@linaro.org Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20230306075651.2449-12-johan+linaro@kernel.org Signed-off-by: Georgi Djakov djakov@kernel.org
diff --git a/drivers/interconnect/qcom/msm8974.c b/drivers/interconnect/qcom/msm8974.c index 5ea192f1141d..1828deaca443 100644 --- a/drivers/interconnect/qcom/msm8974.c +++ b/drivers/interconnect/qcom/msm8974.c @@ -692,7 +692,6 @@ static int msm8974_icc_probe(struct platform_device *pdev) return ret;
provider = &qp->provider; - INIT_LIST_HEAD(&provider->nodes); provider->dev = dev; provider->set = msm8974_icc_set; provider->aggregate = icc_std_aggregate; @@ -700,11 +699,7 @@ static int msm8974_icc_probe(struct platform_device *pdev) provider->data = data; provider->get_bw = msm8974_get_bw;
- ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); - goto err_disable_clks; - } + icc_provider_init(provider);
for (i = 0; i < num_nodes; i++) { size_t j; @@ -712,7 +707,7 @@ static int msm8974_icc_probe(struct platform_device *pdev) node = icc_node_create(qnodes[i]->id); if (IS_ERR(node)) { ret = PTR_ERR(node); - goto err_del_icc; + goto err_remove_nodes; }
node->name = qnodes[i]->name; @@ -729,15 +724,16 @@ static int msm8974_icc_probe(struct platform_device *pdev) } data->num_nodes = num_nodes;
+ ret = icc_provider_register(provider); + if (ret) + goto err_remove_nodes; + platform_set_drvdata(pdev, qp);
return 0;
-err_del_icc: +err_remove_nodes: icc_nodes_remove(provider); - icc_provider_del(provider); - -err_disable_clks: clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
return ret; @@ -747,9 +743,9 @@ static int msm8974_icc_remove(struct platform_device *pdev) { struct msm8974_icc_provider *qp = platform_get_drvdata(pdev);
+ icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks); - icc_provider_del(&qp->provider);
return 0; }