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mcb: Correctly initialize the bus's device

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The mcb bus' device member wasn't correctly initialized and thus wasn't placed
correctly into the driver model.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Andreas Werner <andreas.werner@men.de>
Tested-by: Andreas Werner <andreas.werner@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Thumshirn 2016-05-03 09:46:22 +02:00 committed by Greg Kroah-Hartman
parent bc46b45a42
commit 18d2881980
2 changed files with 18 additions and 6 deletions
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19
drivers/mcb/mcb-core.c
View File

@ -187,6 +187,7 @@ struct mcb_bus *mcb_alloc_bus(struct device *carrier)
{ {
struct mcb_bus *bus; struct mcb_bus *bus;
int bus_nr; int bus_nr;
int rc;
bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL); bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL);
if (!bus) if (!bus)
@ -194,14 +195,26 @@ struct mcb_bus *mcb_alloc_bus(struct device *carrier)
bus_nr = ida_simple_get(&mcb_ida, 0, 0, GFP_KERNEL); bus_nr = ida_simple_get(&mcb_ida, 0, 0, GFP_KERNEL);
if (bus_nr < 0) { if (bus_nr < 0) {
kfree(bus); rc = bus_nr;
return ERR_PTR(bus_nr); goto err_free;
} }
INIT_LIST_HEAD(&bus->children);
bus->bus_nr = bus_nr; bus->bus_nr = bus_nr;
bus->carrier = carrier; bus->carrier = carrier;
device_initialize(&bus->dev);
bus->dev.parent = carrier;
bus->dev.bus = &mcb_bus_type;
dev_set_name(&bus->dev, "mcb:%d", bus_nr);
rc = device_add(&bus->dev);
if (rc)
goto err_free;
return bus; return bus;
err_free:
kfree(bus);
return ERR_PTR(rc);
} }
EXPORT_SYMBOL_GPL(mcb_alloc_bus); EXPORT_SYMBOL_GPL(mcb_alloc_bus);

5
include/linux/mcb.h
View File

@ -21,13 +21,12 @@ struct mcb_device;
/** /**
* struct mcb_bus - MEN Chameleon Bus * struct mcb_bus - MEN Chameleon Bus
* *
* @dev: pointer to carrier device * @dev: bus device
* @children: the child busses * @carrier: pointer to carrier device
* @bus_nr: mcb bus number * @bus_nr: mcb bus number
* @get_irq: callback to get IRQ number * @get_irq: callback to get IRQ number
*/ */
struct mcb_bus { struct mcb_bus {
struct list_head children;
struct device dev; struct device dev;
struct device *carrier; struct device *carrier;
int bus_nr; int bus_nr;