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[DLM] Fix spin lock already unlocked bug 

I just noticed this message when testing some other changes I'd made to
lowcomms (to use workqueues) but the problem seems to be in the current
git trees too. I'm amazed no-one has seen it.

    BUG: spinlock already unlocked on CPU#1, dlm_recoverd/16868

Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Patrick Caulfield 2007-01-02 17:08:54 +00:00 committed by Steven Whitehouse
parent 3fb4a251fe
commit 4edde74eed
1 changed files with 2 additions and 0 deletions
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2
fs/dlm/lowcomms-tcp.c
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@ -709,6 +709,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len,
if (!con)
return NULL;
spin_lock(&con->writequeue_lock);
e = list_entry(con->writequeue.prev, struct writequeue_entry, list);
if ((&e->list == &con->writequeue) ||
(PAGE_CACHE_SIZE - e->end < len)) {
@ -747,6 +748,7 @@ void dlm_lowcomms_commit_buffer(void *mh)
struct connection *con = e->con;
int users;
spin_lock(&con->writequeue_lock);
users = --e->users;
if (users)
goto out;