From: Johan Hovold Date: Mon, 6 Mar 2023 07:56:47 +0000 (+0100) Subject: memory: tegra20-emc: fix interconnect registration race X-Git-Tag: baikal/mips/sdk6.1~79 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=e20b9fd790490d0afc57d74f21f8ed5f4411b336;p=kernel.git memory: tegra20-emc: fix interconnect registration race commit 38b2e362c7c78cdcaf9f9b6a12a336e2ab3cda46 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: a75551786b7b ("memory: tegra20: Support interconnect framework") Cc: stable@vger.kernel.org # 5.11 Cc: Dmitry Osipenko Acked-by: Krzysztof Kozlowski Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230306075651.2449-20-johan+linaro@kernel.org Signed-off-by: Georgi Djakov Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index 25ba3c5e4ad6a..d1f01f80dcbdf 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -1034,15 +1034,13 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) emc->provider.aggregate = soc->icc_ops->aggregate; emc->provider.xlate_extended = emc_of_icc_xlate_extended; - err = icc_provider_add(&emc->provider); - if (err) - goto err_msg; + icc_provider_init(&emc->provider); /* create External Memory Controller node */ node = icc_node_create(TEGRA_ICC_EMC); if (IS_ERR(node)) { err = PTR_ERR(node); - goto del_provider; + goto err_msg; } node->name = "External Memory Controller"; @@ -1063,12 +1061,14 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) node->name = "External Memory (DRAM)"; icc_node_add(node, &emc->provider); + err = icc_provider_register(&emc->provider); + if (err) + goto remove_nodes; + return 0; remove_nodes: icc_nodes_remove(&emc->provider); -del_provider: - icc_provider_del(&emc->provider); err_msg: dev_err(emc->dev, "failed to initialize ICC: %d\n", err);