From: Johan Hovold johan+linaro@kernel.org
commit c5587f61ec050f7e9ebb3e2da29d12af63e833d3 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: d5ef16ba5fbe ("memory: tegra20: Support 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/20230306075651.2449-20-johan+linaro@kernel.org Signed-off-by: Georgi Djakov djakov@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/memory/tegra/tegra20-emc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -1034,15 +1034,13 @@ static int tegra_emc_interconnect_init(s 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(s 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);