UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

interconnect: qcom: msm8974: 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: 4e60a9568d ("interconnect: qcom: add msm8974 driver")
Cc: stable@vger.kernel.org      # 5.5
Reviewed-by: Brian Masney <bmasney@redhat.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230306075651.2449-12-johan+linaro@kernel.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
This commit is contained in:
Johan Hovold 2023-03-06 08:56:39 +01:00 committed by Georgi Djakov
parent 74240a5beb
commit bfe7bcd2b9
1 changed files with 8 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/interconnect/qcom/msm8974.c
View File

@ -692,7 +692,6 @@ static int msm8974_icc_probe(struct platform_device *pdev)
return ret;
provider = &qp->provider;
INIT_LIST_HEAD(&provider->nodes);
provider->dev = dev;
provider->set = msm8974_icc_set;
provider->aggregate = icc_std_aggregate;
@ -700,11 +699,7 @@ static int msm8974_icc_probe(struct platform_device *pdev)
provider->data = data;
provider->get_bw = msm8974_get_bw;
ret = icc_provider_add(provider);
if (ret) {
dev_err(dev, "error adding interconnect provider: %d\n", ret);
goto err_disable_clks;
}
icc_provider_init(provider);
for (i = 0; i < num_nodes; i++) {
size_t j;
@ -712,7 +707,7 @@ static int msm8974_icc_probe(struct platform_device *pdev)
node = icc_node_create(qnodes[i]->id);
if (IS_ERR(node)) {
ret = PTR_ERR(node);
goto err_del_icc;
goto err_remove_nodes;
}
node->name = qnodes[i]->name;
@ -729,15 +724,16 @@ static int msm8974_icc_probe(struct platform_device *pdev)
}
data->num_nodes = num_nodes;
ret = icc_provider_register(provider);
if (ret)
goto err_remove_nodes;
platform_set_drvdata(pdev, qp);
return 0;
err_del_icc:
err_remove_nodes:
icc_nodes_remove(provider);
icc_provider_del(provider);
err_disable_clks:
clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
return ret;
@ -747,9 +743,9 @@ static int msm8974_icc_remove(struct platform_device *pdev)
{
struct msm8974_icc_provider *qp = platform_get_drvdata(pdev);
icc_provider_deregister(&qp->provider);
icc_nodes_remove(&qp->provider);
clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
icc_provider_del(&qp->provider);
return 0;
}