NFSv4: nfs4_return_incompatible_delegation() should check delegation validity

Ensure that we check that the delegation is valid in
nfs4_return_incompatible_delegation() before we try to return it.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a222122..c7e4a9b 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1796,7 +1796,7 @@ static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmo
 
        fmode &= FMODE_READ|FMODE_WRITE;
        rcu_read_lock();
-       delegation = rcu_dereference(NFS_I(inode)->delegation);
+       delegation = nfs4_get_valid_delegation(inode);
        if (delegation == NULL || (delegation->type & fmode) == fmode) {
                rcu_read_unlock();
                return;