src/patches/suse-2.6.27.39/patches.fixes/dm-mpath-skip-inactive-paths-during-activation

   1 From: Hannes Reinecke <hare@suse.de>
   2 Date: Fri, 14 Aug 2009 16:04:05 +0200
   3 Subject: dm-mpath: Skip inactive paths when activating pathgroup
   4 References: bnc#524797
   5
   6 Whenever switch pathgroup happens device mapper will try to activate all the
   7 paths in the new path group. There is no check to see if the path has already
   8 failed. Eventually the failed path will report error. This will reset the
   9 current_pgpath and current_pg. The will result in infinite loop. I have added a
  10 check to skip the activate_path for the failed path. This fixes the problem.
  11
  12 Signed-off-by: Babu Moger <babu.moger@lsi.com>
  13 Signed-off-by: Hannes Reinecke <hare@suse.de>
  14 ---
  15  drivers/md/dm-mpath.c |    5 +++--
  16  1 files changed, 3 insertions(+), 2 deletions(-)
  17
  18 diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
  19 index ffe3a30..642f85f 100644
  20 --- a/drivers/md/dm-mpath.c
  21 +++ b/drivers/md/dm-mpath.c
  22 @@ -465,9 +465,10 @@ static void process_queued_ios(struct work_struct *work)
  23                 m->pg_init_count++;
  24                 m->pg_init_required = 0;
  25                 list_for_each_entry(tmp, &pgpath->pg->pgpaths, list) {
  26 -                       /* Skip disabled paths */
  27 -                       if (!tmp->path.dev)
  28 +                       /* Skip disabled or failed paths */
  29 +                       if (!tmp->path.dev || !tmp->is_active)
  30                                 continue;
  31 +
  32                         queue_work(kmpath_handlerd, &tmp->activate_path);
  33                         m->pg_init_in_progress++;
  34                 }
  35 --
  36 1.6.0.2
  37