1 files changed, 28 insertions, 2 deletions

diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index d7a86935553a..e56117651826 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -85,6 +85,7 @@ EXPORT_SYMBOL(journal_force_commit);
 
 static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
 static void __journal_abort_soft (journal_t *journal, int errno);
+static const char *journal_dev_name(journal_t *journal, char *buffer);
 
 /*
  * Helper function used to manage commit timeouts
@@ -1011,6 +1012,23 @@ void journal_update_superblock(journal_t *journal, int wait)
                 goto out;
         }
 
+        if (buffer_write_io_error(bh)) {
+                char b[BDEVNAME_SIZE];
+                /*
+                 * Oh, dear.  A previous attempt to write the journal
+                 * superblock failed.  This could happen because the
+                 * USB device was yanked out.  Or it could happen to
+                 * be a transient write error and maybe the block will
+                 * be remapped.  Nothing we can do but to retry the
+                 * write and hope for the best.
+                 */
+                printk(KERN_ERR "JBD: previous I/O error detected "
+                       "for journal superblock update for %s.\n",
+                       journal_dev_name(journal, b));
+                clear_buffer_write_io_error(bh);
+                set_buffer_uptodate(bh);
+        }
+
         spin_lock(&journal->j_state_lock);
         jbd_debug(1,"JBD: updating superblock (start %u, seq %d, errno %d)\n",
                   journal->j_tail, journal->j_tail_sequence, journal->j_errno);
@@ -1022,9 +1040,17 @@ void journal_update_superblock(journal_t *journal, int wait)
 
         BUFFER_TRACE(bh, "marking dirty");
         mark_buffer_dirty(bh);
-        if (wait)
+        if (wait) {
                 sync_dirty_buffer(bh);
-        else
+                if (buffer_write_io_error(bh)) {
+                        char b[BDEVNAME_SIZE];
+                        printk(KERN_ERR "JBD: I/O error detected "
+                               "when updating journal superblock for %s.\n",
+                               journal_dev_name(journal, b));
+                        clear_buffer_write_io_error(bh);
+                        set_buffer_uptodate(bh);
+                }
+        } else
                 write_dirty_buffer(bh, WRITE);
 
 out: