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drm/tegra: sor: Fully initialize SOR before registration 

Before registering the SOR host1x client, make sure that it is fully
initialized. This avoids a potential race condition between the SOR's
probe and the host1x device initialization in cases where the SOR is
the final sub-device to register to a host1x instance.

Reported-by: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2021-04-01 17:41:05 +02:00
parent 0cfe5a6e75
commit 5dea42759b
1 changed files with 13 additions and 14 deletions
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27
drivers/gpu/drm/tegra/sor.c
View File

@ -3922,17 +3922,10 @@ static int tegra_sor_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, sor);
pm_runtime_enable(&pdev->dev);
INIT_LIST_HEAD(&sor->client.list);
host1x_client_init(&sor->client);
sor->client.ops = &sor_client_ops;
sor->client.dev = &pdev->dev;
err = host1x_client_register(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
goto rpm_disable;
}
/*
* On Tegra210 and earlier, provide our own implementation for the
* pad output clock.
@ -3944,13 +3937,13 @@ static int tegra_sor_probe(struct platform_device *pdev)
sor->index);
if (!name) {
err = -ENOMEM;
goto unregister;
goto uninit;
}
err = host1x_client_resume(&sor->client);
if (err < 0) {
dev_err(sor->dev, "failed to resume: %d\n", err);
goto unregister;
goto uninit;
}
sor->clk_pad = tegra_clk_sor_pad_register(sor, name);
@ -3961,14 +3954,20 @@ static int tegra_sor_probe(struct platform_device *pdev)
err = PTR_ERR(sor->clk_pad);
dev_err(sor->dev, "failed to register SOR pad clock: %d\n",
err);
goto unregister;
goto uninit;
}
err = __host1x_client_register(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
goto uninit;
}
return 0;
unregister:
host1x_client_unregister(&sor->client);
rpm_disable:
uninit:
host1x_client_exit(&sor->client);
pm_runtime_disable(&pdev->dev);
remove:
tegra_output_remove(&sor->output);