From: Guanjun He <[email protected]>

        I think the osdmap destroy code shoule be protected by map_sem.
If I was wrong, please correct me, thanks!

Signed-off-by: Guanjun He <[email protected]>
---
 net/ceph/osd_client.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 1ffebed..718b100 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1872,11 +1872,13 @@ void ceph_osdc_stop(struct ceph_osd_client *osdc)
        destroy_workqueue(osdc->notify_wq);
        cancel_delayed_work_sync(&osdc->timeout_work);
        cancel_delayed_work_sync(&osdc->osds_timeout_work);
+       down_write(&osdc->map_sem);
        if (osdc->osdmap) {
                ceph_osdmap_destroy(osdc->osdmap);
                osdc->osdmap = NULL;
        }
        remove_all_osds(osdc);
+       up_write(&osdc->map_sem);
        mempool_destroy(osdc->req_mempool);
        ceph_msgpool_destroy(&osdc->msgpool_op);
        ceph_msgpool_destroy(&osdc->msgpool_op_reply);
-- 
1.7.3.4

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