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ACPI: Drop parent field from struct acpi_device

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The parent field in struct acpi_device is, in fact, redundant,
because the dev.parent field in it effectively points to the same
object and it is used by the driver core.

Accordingly, the parent field can be dropped from struct acpi_device
and for this purpose define acpi_dev_parent() to retrieve a parent
struct acpi_device pointer from the dev.parent field in struct
acpi_device.  Next, update all of the users of the parent field
in struct acpi_device to use acpi_dev_parent() instead of it and
drop it.

While at it, drop the ACPI_IS_ROOT_DEVICE() macro that is only used
in one place in a confusing way.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Punit Agrawal <punit.agrawal@bytedance.com>
This commit is contained in:
Rafael J. Wysocki
2022-08-24 18:59:48 +02:00
parent 6e1850b2f3
commit 62fcb99bdf
14 changed files with 46 additions and 37 deletions
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3
drivers/perf/qcom_l3_pmu.c
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@@ -742,7 +742,8 @@ static int qcom_l3_cache_pmu_probe(struct platform_device *pdev)
l3pmu = devm_kzalloc(&pdev->dev, sizeof(*l3pmu), GFP_KERNEL);
name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "l3cache_%s_%s",
acpi_dev->parent->pnp.unique_id, acpi_dev->pnp.unique_id);
acpi_dev_parent(acpi_dev)->pnp.unique_id,
acpi_dev->pnp.unique_id);
if (!l3pmu || !name)
return -ENOMEM;