drivers/media/pci/ivtv/ivtv-alsa-main.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/ivtv/ivtv-alsa-main.c

Extension

.c

Size

6648 bytes

Lines

275

Domain

Driver Families

Bucket

drivers/media

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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 an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• ivtv-driver.h
• ivtv-version.h
• ivtv-alsa.h
• ivtv-alsa-pcm.h
• sound/core.h
• sound/initval.h

Detected Declarations

• function snd_ivtv_card_free
• function snd_ivtv_card_private_free
• function snd_ivtv_card_create
• function snd_ivtv_card_set_names
• function snd_ivtv_init
• function ivtv_alsa_load
• function ivtv_alsa_init
• function snd_ivtv_exit
• function ivtv_alsa_exit_callback
• function ivtv_alsa_exit
• module init ivtv_alsa_init

Annotated Snippet

struct device_driver *drv;
	int ret;

	pr_info("ivtv-alsa: module unloading...\n");

	drv = driver_find("ivtv", &pci_bus_type);
	ret = driver_for_each_device(drv, NULL, NULL, ivtv_alsa_exit_callback);
	(void)ret;	/* suppress compiler warning */

	ivtv_ext_init = NULL;
	pr_info("ivtv-alsa: module unload complete\n");
}

module_init(ivtv_alsa_init);
module_exit(ivtv_alsa_exit);

Annotation

• Immediate include surface: `ivtv-driver.h`, `ivtv-version.h`, `ivtv-alsa.h`, `ivtv-alsa-pcm.h`, `sound/core.h`, `sound/initval.h`.
• Detected declarations: `function snd_ivtv_card_free`, `function snd_ivtv_card_private_free`, `function snd_ivtv_card_create`, `function snd_ivtv_card_set_names`, `function snd_ivtv_init`, `function ivtv_alsa_load`, `function ivtv_alsa_init`, `function snd_ivtv_exit`, `function ivtv_alsa_exit_callback`, `function ivtv_alsa_exit`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: pattern 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.