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path: root/drivers/md/md.c
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Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3c79243e9d07..16a97dc385b4 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7589,8 +7589,11 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
err = -EBUSY;
goto out;
}
- WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags));
- set_bit(MD_CLOSING, &mddev->flags);
+ if (test_and_set_bit(MD_CLOSING, &mddev->flags)) {
+ mutex_unlock(&mddev->open_mutex);
+ err = -EBUSY;
+ goto out;
+ }
did_set_md_closing = true;
mutex_unlock(&mddev->open_mutex);
sync_blockdev(bdev);