NFS: Work correctly with single-page ->writepage() calls

 Ensure that we always initiate flushing of data before we exit
 a single-page ->writepage() call.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 3107908..95d00f9 100644 (file)
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -232,19 +232,16 @@ static int nfs_writepage_async(struct nfs_open_context *ctx,
                unsigned int offset, unsigned int count)
 {
        struct nfs_page *req;
-       int             status;
 
        req = nfs_update_request(ctx, inode, page, offset, count);
-       status = (IS_ERR(req)) ? PTR_ERR(req) : 0;
-       if (status < 0)
-               goto out;
+       if (IS_ERR(req))
+               return PTR_ERR(req);
        /* Update file length */
        nfs_grow_file(page, offset, count);
        /* Set the PG_uptodate flag? */
        nfs_mark_uptodate(page, offset, count);
        nfs_unlock_request(req);
- out:
-       return status;
+       return 0;
 }
 
 static int wb_priority(struct writeback_control *wbc)
@@ -304,11 +301,8 @@ do_it:
        lock_kernel();
        if (!IS_SYNC(inode) && inode_referenced) {
                err = nfs_writepage_async(ctx, inode, page, 0, offset);
-               if (err >= 0) {
-                       err = 0;
-                       if (wbc->for_reclaim)
-                               nfs_flush_inode(inode, 0, 0, FLUSH_STABLE);
-               }
+               if (!wbc->for_writepages)
+                       nfs_flush_inode(inode, 0, 0, wb_priority(wbc));
        } else {
                err = nfs_writepage_sync(ctx, inode, page, 0,
                                                offset, priority);