From: Johan Hovold <johan+linaro@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx # 5.11
Cc: Dmitry Osipenko <digetx@xxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230306075651.2449-20-johan+linaro@xxxxxxxxxx
Signed-off-by: Georgi Djakov <djakov@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
