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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: f0d8048525 ("interconnect: Add imx core driver")
Cc: stable@vger.kernel.org      # 5.8
Cc: Alexandre Bailon <abailon@baylibre.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # 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 <djakov@kernel.org>
This commit is contained in:
Johan Hovold 2023-03-06 08:56:32 +01:00 committed by Georgi Djakov
parent eb59eca0d8
commit 9fbd35520f
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/interconnect/imx/imx.c
View File

@ -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);
return ret;
}
ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings);
if (ret)
goto provider_del;
return ret;
ret = icc_provider_register(provider);
if (ret)
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);