On 1.02.2023 11:15, Johan Hovold wrote:

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: Leonard Crestez leonard.crestez@nxp.com Cc: Alexandre Bailon abailon@baylibre.com Signed-off-by: Johan Hovold johan+linaro@kernel.org

---

Reviewed-by: Konrad Dybcio konrad.dybcio@linaro.org

Konrad

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);