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| author | Milan Broz <mbroz@redhat.com> | 2009-06-22 10:12:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-07-02 16:32:10 -0700 |
| commit | 9fad9f263a7065be94bf77519346d0d854ff3b92 (patch) | |
| tree | 1aabe86a3a1ed83fbf088337dada75a41c54b0c6 | |
| parent | c3597e89c932b70d10803954d004e36e5f623f24 (diff) | |
| download | linux-9fad9f263a7065be94bf77519346d0d854ff3b92.tar.gz linux-9fad9f263a7065be94bf77519346d0d854ff3b92.tar.bz2 linux-9fad9f263a7065be94bf77519346d0d854ff3b92.zip | |
dm: sysfs skip output when device is being destroyed
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>
| -rw-r--r-- | 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 ace998ce59f6..925efafa6a5b 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -265,6 +265,10 @@ static int dm_blk_open(struct inode *inode, struct file *file) goto out; } + if (test_bit(DMF_FREEING, &md->flags) || + test_bit(DMF_DELETING, &md->flags)) + return NULL; + dm_get(md); atomic_inc(&md->open_count); |