From 9fbd35520f1f7f3cbe1873939a27ad9b009f21f9 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 6 Mar 2023 08:56:32 +0100 Subject: interconnect: imx: 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: f0d8048525d7 ("interconnect: Add imx core driver") Cc: stable@vger.kernel.org # 5.8 Cc: Alexandre Bailon Reviewed-by: Konrad Dybcio Signed-off-by: Johan Hovold Tested-by: Luca Ceresoli # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-5-johan+linaro@kernel.org Signed-off-by: Georgi Djakov --- drivers/interconnect/imx/imx.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c index 823d9be9771a..979ed610f704 100644 --- a/drivers/interconnect/imx/imx.c +++ b/drivers/interconnect/imx/imx.c @@ -295,6 +295,9 @@ int imx_icc_register(struct platform_device *pdev, provider->xlate = of_icc_xlate_onecell; provider->data = data; provider->dev = dev->parent; + + icc_provider_init(provider); + platform_set_drvdata(pdev, imx_provider); if (settings) { @@ -306,20 +309,18 @@ int imx_icc_register(struct platform_device *pdev, } } - ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); + ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + if (ret) return ret; - } - ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + ret = icc_provider_register(provider); if (ret) - goto provider_del; + goto err_unregister_nodes; return 0; -provider_del: - icc_provider_del(provider); +err_unregister_nodes: + imx_icc_unregister_nodes(&imx_provider->provider); return ret; } EXPORT_SYMBOL_GPL(imx_icc_register); @@ -328,9 +329,8 @@ void imx_icc_unregister(struct platform_device *pdev) { struct imx_icc_provider *imx_provider = platform_get_drvdata(pdev); + icc_provider_deregister(&imx_provider->provider); imx_icc_unregister_nodes(&imx_provider->provider); - - icc_provider_del(&imx_provider->provider); } EXPORT_SYMBOL_GPL(imx_icc_unregister); -- cgit v1.2.3