[ Upstream commit
0c3812c347bfb0dc213556a195e79850c55702f5 ]
cdev->online for the purge function must not be checked for the
non-IO subchannel type. Make sure that we are deriving the cdev only
from sch-type SUBCHANNEL_TYPE_IO.
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Stable-dep-of:
1b6074112742 ("s390/cio: fix out-of-bounds access on cio_ignore free")
Signed-off-by: Sasha Levin <sashal@kernel.org>
{
struct idset *set = data;
struct subchannel *sch = to_subchannel(dev);
- struct ccw_device *cdev = sch_get_cdev(sch);
+ struct ccw_device *cdev;
- if (cdev && cdev->online)
- idset_sch_del(set, sch->schid);
+ if (sch->st == SUBCHANNEL_TYPE_IO) {
+ cdev = sch_get_cdev(sch);
+ if (cdev && cdev->online)
+ idset_sch_del(set, sch->schid);
+ }
return 0;
}