[dm-devel] [PATCH] Do not process sysfs attributes when device is being destructed
Milan Broz
mbroz at redhat.com
Sun May 31 20:55:00 UTC 2009
Do not process sysfs attributes when device is being destructed.
Otherwise code can cause
BUG_ON(test_bit(DMF_FREEING, &md->flags));
in dm_put() call.
Signed-off-by: Milan Broz <mbroz at redhat.com>
---
drivers/md/dm.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f43b099..9d3595b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1806,6 +1806,10 @@ 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;
}
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