From: Johan Hovold Date: Mon, 6 Mar 2023 07:56:39 +0000 (+0100) Subject: interconnect: qcom: msm8974: fix registration race X-Git-Tag: baikal/mips/sdk6.1~65 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=3653b97acde6e80bd1036e16a212da4c9e0d4cab;p=kernel.git interconnect: qcom: msm8974: fix registration race commit 48c4effb941ffaf94a58f03c76fa33b1777ad753 upstream. 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: 4c2c9b495e3e ("interconnect: qcom: add msm8974 driver") Cc: stable@vger.kernel.org # 5.5 Reviewed-by: Brian Masney Reviewed-by: Konrad Dybcio Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230306075651.2449-12-johan+linaro@kernel.org Signed-off-by: Georgi Djakov Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/interconnect/qcom/msm8974.c b/drivers/interconnect/qcom/msm8974.c index 5ea192f1141dc..1828deaca4432 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; }