Commit
0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513
"s390: use device_remove_file_self() instead of device_schedule_callback()"
changed ccwgroup to use an extra work queue instead of
device_schedule_callback. This function obtained an extra device
reference for its async work which is missing in the new implementation
and results in a "freeing memory with a lock still held" BUG. Fix
this by obtaining an extra reference for the async work.
Reported-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
container_of(work, struct ccwgroup_device, ungroup_work);
ccwgroup_ungroup(gdev);
+ put_device(&gdev->dev);
}
static void ccwgroup_release(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(data);
- if (action == BUS_NOTIFY_UNBIND_DRIVER)
+ if (action == BUS_NOTIFY_UNBIND_DRIVER) {
+ get_device(&gdev->dev);
schedule_work(&gdev->ungroup_work);
+ }
return NOTIFY_OK;
}