From 0444d76ae64fffc7851797fc1b6ebdbb44ac504a Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Tue, 29 Mar 2011 18:08:50 +1100 Subject: fs: don't use igrab() while holding i_lock MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix the incorrect use of igrab() inside the i_lock in NFS and Ceph‥ If we are already holding the i_lock, we have a reference to the inode so we can safely use ihold() to gain an extra reference. This avoids hangs due to lock recursion on the i_lock now that the inode_lock is gone and igrab() uses the i_lock itself. Signed-off-by: Dave Chinner Cc: Al Viro Cc: linux-fsdevel@vger.kernel.org Cc: Ryan Mallon Signed-off-by: Linus Torvalds --- fs/nfs/nfs4state.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nfs/nfs4state.c') diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index ab1bf5bb021f..a6804f704d9d 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -590,7 +590,8 @@ nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) state->owner = owner; atomic_inc(&owner->so_count); list_add(&state->inode_states, &nfsi->open_states); - state->inode = igrab(inode); + ihold(inode); + state->inode = inode; spin_unlock(&inode->i_lock); /* Note: The reclaim code dictates that we add stateless * and read-only stateids to the end of the list */ -- cgit v1.2.3