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authorMilan Broz <mbroz@redhat.com>2009-06-22 10:12:11 +0100
committerAlasdair G Kergon <agk@redhat.com>2009-06-22 10:12:11 +0100
commit4d89b7b4e4726893453d0fb4ddbb5b3e16353994 (patch)
treef0775811ee4942eadd555d5ddcdbb5ff313290bb
parente094f4f15f5169526c7200b9bde44b900548a81e (diff)
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>
-rw-r--r--drivers/md/dm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 48db308fae67..f1db689667ea 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;
}