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-rw-r--r--fs/nfs/file.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index a3a073604070..55bc8c8ca71a 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -488,6 +488,10 @@ static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file,
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_client *cl = NFS_SERVER(inode)->nfs_client;
+ if (!file->f_mapping->a_ops->swap_rw)
+ /* Cannot support swap */
+ return -EINVAL;
+
spin_lock(&inode->i_lock);
blocks = inode->i_blocks;
isize = inode->i_size;