Commit 4d89b7b4 authored Jun 22, 2009 by Milan Broz Committed by Alasdair G Kergon Jun 22, 2009

dm: sysfs skip output when device is being destroyed



Do not process sysfs attributes when device is being destroyed.

Otherwise code can cause
  BUG_ON(test_bit(DMF_FREEING, &md->flags));
in dm_put() call.

Cc: stable@kernel.org
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

parent e094f4f1

drivers/md/dm.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1777,6 +1777,10 @@ struct mapped_device dm_get_from_kobject(struct kobject kobj)
		if (&md->kobj != kobj)
		return NULL;

		if (test_bit(DMF_FREEING, &md->flags) \|\|
		test_bit(DMF_DELETING, &md->flags))
		return NULL;

		dm_get(md);
		return md;
		}