[PATCH 1/4] nfsd: warn on odd reply state in nfsd_vfs_read

["J. Bruce Fields" <bfields@redhat.com>]

From: "J. Bruce Fields" <bfields@redhat.com>

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>
---
 fs/nfsd/vfs.c |    1 +
 1 file changed, 1 insertion(+)

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 @@ nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 			.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 {
-- 
1.7.9.5