From: Chuck Lever <redacted>

RFC 7862 permits the callback service to respond to a CB_OFFLOAD
operation with NFS4ERR_DELAY. Use that instead of
NFS4ERR_SERVERFAULT for temporary memory allocation failure, as that
is more consistent with how other operations report memory
allocation failure.

Signed-off-by: Chuck Lever <redacted>
---
 fs/nfs/callback_proc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 7832fb0369a1..8397c43358bd 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c

@@ -718,7 +718,7 @@ __be32 nfs4_callback_offload(void *data, void *dummy,
 
 	copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL);
 	if (!copy)
-		return htonl(NFS4ERR_SERVERFAULT);
+		return cpu_to_be32(NFS4ERR_DELAY);
 
 	spin_lock(&cps->clp->cl_lock);
 	rcu_read_lock();

-- 
2.47.0