drbd: Fix for a race between IO and a detach operation [Bugz 262]
In D_DISKLESS we do not hand out any new references to ldev (local_cnt) therefore waiting until all previously handed out refereces got returned is sufficient before actually freeing mdev->ldev. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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@ -1298,6 +1298,7 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
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dev_err(DEV, "Sending state in drbd_io_error() failed\n");
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}
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wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
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lc_destroy(mdev->resync);
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mdev->resync = NULL;
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lc_destroy(mdev->act_log);
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