commit 3a0671e7ba195c5cb9b1a43265ef24a0875afcaa
author Greg Kroah-Hartman <gregkh@linuxfoundation.org> Wed Oct 10 08:46:11 2018 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Wed Oct 10 08:46:11 2018 +0200
tree 1bff69dbdeb4b1753b0764a927c2e1a4aa2a2092
parent 3d647e62686f447ca4c9ba6b4500fed5f0368a98
parent dc480feb454a975b7ee2c18a2f98fb34e04d3baf

Merge tag 'gfs2-4.19.fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Andreas writes:
  "gfs2 4.19 fix:

   This fixes a regression introduced in commit 64bc06bb32ee "gfs2:
   iomap buffered write support""

* tag 'gfs2-4.19.fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix iomap buffered write support for journaled files

fs/gfs2/bmap.c

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 03128ed..3c159a7 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -975,6 +975,10 @@
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 
+	if (!page_has_buffers(page)) {
+		create_empty_buffers(page, inode->i_sb->s_blocksize,
+				     (1 << BH_Dirty)|(1 << BH_Uptodate));
+	}
 	gfs2_page_add_databufs(ip, page, offset_in_page(pos), copied);
 }