1 files changed, 17 insertions, 1 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ab2247d642c6..a0ab3754d0d6 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1527,9 +1527,25 @@ static int walk_page_buffers(handle_t *handle,
 static int do_journal_get_write_access(handle_t *handle,
                                        struct buffer_head *bh)
 {
+        int dirty = buffer_dirty(bh);
+        int ret;
+
         if (!buffer_mapped(bh) || buffer_freed(bh))
                 return 0;
-        return ext4_journal_get_write_access(handle, bh);
+        /*
+         * __block_prepare_write() could have dirtied some buffers. Clean
+         * the dirty bit as jbd2_journal_get_write_access() could complain
+         * otherwise about fs integrity issues. Setting of the dirty bit
+         * by __block_prepare_write() isn't a real problem here as we clear
+         * the bit before releasing a page lock and thus writeback cannot
+         * ever write the buffer.
+         */
+        if (dirty)
+                clear_buffer_dirty(bh);
+        ret = ext4_journal_get_write_access(handle, bh);
+        if (!ret && dirty)
+                ret = ext4_handle_dirty_metadata(handle, NULL, bh);
+        return ret;
 }
 
 /*