[RFC PATCH 2/4] dax: set errors in mapping when writeback fails

[Jeff Layton]

In order to get proper error codes from fsync, we must set an error in
the mapping range when writeback fails.

Signed-off-by: Jeff Layton <jlay...@redhat.com>
---
 fs/dax.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index de622d4282a6..b76b3ffc141a 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -892,8 +892,10 @@ int dax_writeback_mapping_range(struct address_space 
*mapping,
 
                        ret = dax_writeback_one(bdev, mapping, indices[i],
                                        pvec.pages[i]);
-                       if (ret < 0)
+                       if (ret < 0) {
+                               filemap_set_wb_error(mapping, ret);
                                return ret;
+                       }
                }
        }
        return 0;
-- 
2.9.3