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| author | Joseph Qi <joseph.qi@huawei.com> | 2015-10-22 13:32:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-10-23 17:55:10 +0900 |
| commit | b67de018b37a97548645a879c627d4188518e907 (patch) | |
| tree | 79593d33b91fa8188454d61af8634dbfe35230b3 | |
| parent | bb387002693ed28b2bb0408c5dec65521b71e5f1 (diff) | |
| download | lwn-b67de018b37a97548645a879c627d4188518e907.tar.gz lwn-b67de018b37a97548645a879c627d4188518e907.zip | |
ocfs2/dlm: unlock lockres spinlock before dlm_lockres_put
dlm_lockres_put will call dlm_lockres_release if it is the last
reference, and then it may call dlm_print_one_lock_resource and
take lockres spinlock.
So unlock lockres spinlock before dlm_lockres_put to avoid deadlock.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/ocfs2/dlm/dlmmaster.c | 3 | ||||
| -rw-r--r-- | fs/ocfs2/dlm/dlmrecovery.c | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index ee5aa4daaea0..ce38b4ccc9ab 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -1658,12 +1658,13 @@ send_response: if (ret < 0) { mlog(ML_ERROR, "failed to dispatch assert master work\n"); response = DLM_MASTER_RESP_ERROR; + spin_unlock(&res->spinlock); dlm_lockres_put(res); } else { dispatched = 1; __dlm_lockres_grab_inflight_worker(dlm, res); + spin_unlock(&res->spinlock); } - spin_unlock(&res->spinlock); } else { if (res) dlm_lockres_put(res); diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index 3d90ad7ff91f..58eaa5c0d387 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -1723,8 +1723,8 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, } else { dispatched = 1; __dlm_lockres_grab_inflight_worker(dlm, res); + spin_unlock(&res->spinlock); } - spin_unlock(&res->spinlock); } else { /* put.. incase we are not the master */ spin_unlock(&res->spinlock); |