From 4d89b7b4e4726893453d0fb4ddbb5b3e16353994 Mon Sep 17 00:00:00 2001 From: Milan Broz Date: Mon, 22 Jun 2009 10:12:11 +0100 Subject: [PATCH] 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 Signed-off-by: Alasdair G Kergon --- drivers/md/dm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 48db308..f1db689 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -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; } -- 2.7.4