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Subject[PATCH v2 3/8] iommu/tegra: gart: Clean up drivers module code
Date
GART driver is built-in, hence it can't be unloaded and the module removal
code is never used. This patch merely removes the dead code and makes
GART driver explicitly built-in by dropping the drivers bind/unbind sysfs
attributes. Lastly disallow to defer drivers probing, since it's a core
driver and actually nothing should cause the deferred probe.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/iommu/tegra-gart.c | 27 ++++-----------------------
1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index f8b653e25914..141ff0c79ee4 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -502,20 +502,6 @@ static int tegra_gart_probe(struct platform_device *pdev)
return 0;
}

-static int tegra_gart_remove(struct platform_device *pdev)
-{
- struct gart_device *gart = platform_get_drvdata(pdev);
-
- iommu_device_unregister(&gart->iommu);
- iommu_device_sysfs_remove(&gart->iommu);
-
- writel(0, gart->regs + GART_CONFIG);
- if (gart->savedata)
- vfree(gart->savedata);
- gart_handle = NULL;
- return 0;
-}
-
static const struct dev_pm_ops tegra_gart_pm_ops = {
.suspend = tegra_gart_suspend,
.resume = tegra_gart_resume,
@@ -529,26 +515,21 @@ MODULE_DEVICE_TABLE(of, tegra_gart_of_match);

static struct platform_driver tegra_gart_driver = {
.probe = tegra_gart_probe,
- .remove = tegra_gart_remove,
.driver = {
.name = "tegra-gart",
.pm = &tegra_gart_pm_ops,
.of_match_table = tegra_gart_of_match,
+ .suppress_bind_attrs = true,
},
+ .prevent_deferred_probe = true,
};

-static int tegra_gart_init(void)
+static int __init tegra_gart_init(void)
{
return platform_driver_register(&tegra_gart_driver);
}
-
-static void __exit tegra_gart_exit(void)
-{
- platform_driver_unregister(&tegra_gart_driver);
-}
-
subsys_initcall(tegra_gart_init);
-module_exit(tegra_gart_exit);
+
module_param(gart_debug, bool, 0644);

MODULE_PARM_DESC(gart_debug, "Enable GART debugging");
--
2.18.0
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