From: Johan Hovold johan+linaro@kernel.org
commit 5553055c62683ce339f9ef5fb2a26c8331485d68 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: 06f079816d4c ("memory: tegra-mc: Add interconnect framework") Cc: stable@vger.kernel.org # 5.11 Cc: Dmitry Osipenko digetx@gmail.com Acked-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20230306075651.2449-18-johan+linaro@kernel.org Signed-off-by: Georgi Djakov djakov@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/memory/tegra/mc.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-)
--- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -769,16 +769,12 @@ static int tegra_mc_interconnect_setup(s mc->provider.aggregate = mc->soc->icc_ops->aggregate; mc->provider.xlate_extended = mc->soc->icc_ops->xlate_extended;
- err = icc_provider_add(&mc->provider); - if (err) - return err; + icc_provider_init(&mc->provider);
/* create Memory Controller node */ node = icc_node_create(TEGRA_ICC_MC); - if (IS_ERR(node)) { - err = PTR_ERR(node); - goto del_provider; - } + if (IS_ERR(node)) + return PTR_ERR(node);
node->name = "Memory Controller"; icc_node_add(node, &mc->provider); @@ -805,12 +801,14 @@ static int tegra_mc_interconnect_setup(s goto remove_nodes; }
+ err = icc_provider_register(&mc->provider); + if (err) + goto remove_nodes; + return 0;
remove_nodes: icc_nodes_remove(&mc->provider); -del_provider: - icc_provider_del(&mc->provider);
return err; }