diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 75a15f371b00c6e19a5e953e25b68be0ea391f03..7f34f4716165311f66b62b81dd25a32e899dcf80 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -156,7 +156,15 @@ void __jbd2_log_wait_for_space(journal_t *journal)
 				/* We were able to recover space; yay! */
 				;
 			} else if (tid) {
+				/*
+				 * jbd2_journal_commit_transaction() may want
+				 * to take the checkpoint_mutex if JBD2_FLUSHED
+				 * is set.  So we need to temporarily drop it.
+				 */
+				mutex_unlock(&journal->j_checkpoint_mutex);
 				jbd2_log_wait_commit(journal, tid);
+				write_lock(&journal->j_state_lock);
+				continue;
 			} else {
 				printk(KERN_ERR "%s: needed %d blocks and "
 				       "only had %d space available\n",