drivers/edac/edac_module.c

Source file repositories/reference/linux-study-clean/drivers/edac/edac_module.c

File Facts

System
Linux kernel
Corpus path
drivers/edac/edac_module.c
Extension
.c
Size
3380 bytes
Lines
169
Domain
Driver Families
Bucket
drivers/edac
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.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct bus_type edac_subsys = {
	.name = "edac",
	.dev_name = "edac",
};

static int edac_subsys_init(void)
{
	int err;

	/* create the /sys/devices/system/edac directory */
	err = subsys_system_register(&edac_subsys, NULL);
	if (err)
		printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");

	return err;
}

static void edac_subsys_exit(void)
{
	bus_unregister(&edac_subsys);
}

/* return pointer to the 'edac' node in sysfs */
const struct bus_type *edac_get_sysfs_subsys(void)
{
	return &edac_subsys;
}
EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
/*
 * edac_init
 *      module initialization entry point
 */
static int __init edac_init(void)
{
	int err = 0;

	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");

	err = edac_subsys_init();
	if (err)
		return err;

	/*
	 * Harvest and clear any boot/initialization PCI parity errors
	 *
	 * FIXME: This only clears errors logged by devices present at time of
	 *      module initialization.  We should also do an initial clear
	 *      of each newly hotplugged device.
	 */
	edac_pci_clear_parity_errors();

	err = edac_mc_sysfs_init();
	if (err)
		goto err_sysfs;

	edac_debugfs_init();

	err = edac_workqueue_setup();
	if (err) {
		edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
		goto err_wq;
	}

	return 0;

err_wq:
	edac_debugfs_exit();
	edac_mc_sysfs_exit();

err_sysfs:
	edac_subsys_exit();

	return err;
}

/*
 * edac_exit()
 *      module exit/termination function
 */
static void __exit edac_exit(void)
{
	edac_dbg(0, "\n");

	/* tear down the various subsystems */
	edac_workqueue_teardown();
	edac_mc_sysfs_exit();
	edac_debugfs_exit();
	edac_subsys_exit();
}

Annotation

Implementation Notes