nfsd: warn on odd reply state in nfsd_vfs_read
As far as I can tell this shouldn't currently happen--or if it does,
something is wrong and data is going to be corrupted.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 0ef9b6b..b31e46e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -936,6 +936,7 @@
.u.data = rqstp,
};
+ WARN_ON_ONCE(rqstp->rq_resused != 1);
rqstp->rq_resused = 1;
host_err = splice_direct_to_actor(file, &sd, nfsd_direct_splice_actor);
} else {