NFSv4.2: mark OFFLOAD_CANCEL MOVEABLE

[ Upstream commit 668135b9348c53fd205f5e07d11e82b10f31b55b ]

OFFLOAD_CANCEL should be marked MOVEABLE for when we need to move
tasks off a non-functional transport.

Fixes: c975c20926 ("NFS send OFFLOAD_CANCEL when COPY killed")
Signed-off-by: Olga Kornievskaia <okorniev@redhat.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

fs/nfs/nfs42proc.c

@@ -552,7 +552,7 @@ static int nfs42_do_offload_cancel_async(struct file *dst,
 		.rpc_message = &msg,
 		.callback_ops = &nfs42_offload_cancel_ops,
 		.workqueue = nfsiod_workqueue,
-		.flags = RPC_TASK_ASYNC,
+		.flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
 	};
 	int status;