| Date | Tue, 30 Jun 2009 17:24:25 -0700 | From | Greg KH <> | Subject | [patch 096/108] dm: sysfs skip output when device is being destroyed |
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2.6.30-stable review patch. If anyone has any objections, please let us know.
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From: Milan Broz <mbroz@redhat.com>
commit 4d89b7b4e4726893453d0fb4ddbb5b3e16353994 upstream.
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.
Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/md/dm.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1780,6 +1780,10 @@ struct mapped_device *dm_get_from_kobjec 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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