1 files changed, 11 insertions, 2 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 29ac8ee46039..703c1648b068 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1754,6 +1754,7 @@ static int cifs_writepages(struct address_space *mapping,
         bool done = false, scanned = false, range_whole = false;
         pgoff_t end, index;
         struct cifs_writedata *wdata;
+        struct TCP_Server_Info *server;
         struct page *page;
         int rc = 0;
 
@@ -1904,7 +1905,8 @@ retry:
                                 break;
                         }
                         wdata->pid = wdata->cfile->pid;
-                        rc = cifs_async_writev(wdata);
+                        server = tlink_tcon(wdata->cfile->tlink)->ses->server;
+                        rc = server->ops->async_writev(wdata);
                 } while (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN);
 
                 for (i = 0; i < nr_pages; ++i)
@@ -2235,6 +2237,9 @@ static int
 cifs_uncached_retry_writev(struct cifs_writedata *wdata)
 {
         int rc;
+        struct TCP_Server_Info *server;
+
+        server = tlink_tcon(wdata->cfile->tlink)->ses->server;
 
         do {
                 if (wdata->cfile->invalidHandle) {
@@ -2242,7 +2247,7 @@ cifs_uncached_retry_writev(struct cifs_writedata *wdata)
                         if (rc != 0)
                                 continue;
                 }
-                rc = cifs_async_writev(wdata);
+                rc = server->ops->async_writev(wdata);
         } while (rc == -EAGAIN);
 
         return rc;
@@ -2277,6 +2282,10 @@ cifs_iovec_write(struct file *file, const struct iovec *iov,
         cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
         open_file = file->private_data;
         tcon = tlink_tcon(open_file->tlink);
+
+        if (!tcon->ses->server->ops->async_writev)
+                return -ENOSYS;
+
         offset = *poffset;
 
         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)