sound/firewire/lib.c

Source file repositories/reference/linux-study-clean/sound/firewire/lib.c

File Facts

System
Linux kernel
Corpus path
sound/firewire/lib.c
Extension
.c
Size
2129 bytes
Lines
73
Domain
Driver Families
Bucket
sound/firewire
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!(flags & FW_FIXED_GENERATION)) {
			generation = device->generation;
			smp_rmb(); /* node_id vs. generation */
		}
		rcode = fw_run_transaction(device->card, tcode,
					   device->node_id, generation,
					   device->max_speed, offset,
					   buffer, length);

		if (rcode == RCODE_COMPLETE)
			return 0;

		if (rcode == RCODE_GENERATION && (flags & FW_FIXED_GENERATION))
			return -EAGAIN;

		if (rcode_is_permanent_error(rcode) || ++tries >= 3) {
			if (!(flags & FW_QUIET))
				dev_err(&unit->device,
					"transaction failed: %s\n",
					fw_rcode_string(rcode));
			return -EIO;
		}

		msleep(ERROR_RETRY_DELAY_MS);
	}
}
EXPORT_SYMBOL(snd_fw_transaction);

MODULE_DESCRIPTION("FireWire audio helper functions");
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes