jbd2: check return value of blkdev_issue_flush()

blkdev_issue_flush() can fail; make sure the error gets properly
propagated.

This is a port of the equivalent jbd patch from commit 349ecd6a3c0e.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 5 insertions, 2 deletions

diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 0131e4362534..626846bac32f 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -289,8 +289,11 @@ int jbd2_journal_recover(journal_t *journal)
         if (!err)
                 err = err2;
         /* Make sure all replayed data is on permanent storage */
-        if (journal->j_flags & JBD2_BARRIER)
-                blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+        if (journal->j_flags & JBD2_BARRIER) {
+                err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+                if (!err)
+                        err = err2;
+        }
         return err;
 }