From db0f6ce69776370232431eb8be85a5b18b0019c0 Mon Sep 17 00:00:00 2001 From: Sunil Mushran Date: Mon, 1 Feb 2010 16:55:50 -0800 Subject: ocfs2: Remove overzealous BUG_ON during blocked lock processing During blocked lock processing, we should consider the possibility that the lock is no longer blocking. Joel Becker assisted in fixing this issue. Reported-by: David Teigland Signed-off-by: Sunil Mushran Signed-off-by: Joel Becker --- fs/ocfs2/dlmglue.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'fs/ocfs2/dlmglue.c') diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index ac24f49ae2fb..ce8e061c9a22 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -3392,9 +3392,17 @@ static int ocfs2_unblock_lock(struct ocfs2_super *osb, spin_lock_irqsave(&lockres->l_lock, flags); - BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); - recheck: + /* + * Is it still blocking? If not, we have no more work to do. + */ + if (!(lockres->l_flags & OCFS2_LOCK_BLOCKED)) { + BUG_ON(lockres->l_blocking != DLM_LOCK_NL); + spin_unlock_irqrestore(&lockres->l_lock, flags); + ret = 0; + goto leave; + } + if (lockres->l_flags & OCFS2_LOCK_BUSY) { /* XXX * This is a *big* race. The OCFS2_LOCK_PENDING flag -- cgit v1.2.3