drivers/acpi/fan_attr.c

File Facts

System

Linux kernel

Corpus path

drivers/acpi/fan_attr.c

Extension

.c

Size

4101 bytes

Lines

145

Domain

Driver Families

Bucket

drivers/acpi

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/module.h
• linux/init.h
• linux/acpi.h
• fan.h

Detected Declarations

• function show_state
• function show_fan_speed
• function show_fine_grain_control
• function acpi_fan_create_attributes
• function acpi_fan_delete_attributes

Annotated Snippet

if (status) {
			int j;

			for (j = 0; j < i; ++j)
				sysfs_remove_file(&device->dev.kobj, &fan->fps[j].dev_attr.attr);
			goto rem_fine_grain_attr;
		}
	}

	return 0;

rem_fine_grain_attr:
	sysfs_remove_file(&device->dev.kobj, &fan->fine_grain_control.attr);

rem_fst_attr:
	sysfs_remove_file(&device->dev.kobj, &fan->fst_speed.attr);

	return status;
}

void acpi_fan_delete_attributes(struct acpi_device *device)
{
	struct acpi_fan *fan = acpi_driver_data(device);
	int i;

	sysfs_remove_file(&device->dev.kobj, &fan->fst_speed.attr);

	if (!fan->acpi4)
		return;

	for (i = 0; i < fan->fps_count; ++i)
		sysfs_remove_file(&device->dev.kobj, &fan->fps[i].dev_attr.attr);

	sysfs_remove_file(&device->dev.kobj, &fan->fine_grain_control.attr);
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/init.h`, `linux/acpi.h`, `fan.h`.
• Detected declarations: `function show_state`, `function show_fan_speed`, `function show_fine_grain_control`, `function acpi_fan_create_attributes`, `function acpi_fan_delete_attributes`.
• Atlas domain: Driver Families / drivers/acpi.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.