)]}'
{
  "commit": "87c8331fcf72e501c3a3c0cdc5c9391ec72f7cf2",
  "tree": "4ed0e98760c977010fe54778c1a25625840b4583",
  "parents": [
    "e139942d77a6e3ac83bc322e826668054a8601d6"
  ],
  "author": {
    "name": "Dan Williams",
    "email": "dan.j.williams@intel.com",
    "time": "Thu Nov 17 17:59:51 2011 -0800"
  },
  "committer": {
    "name": "James Bottomley",
    "email": "JBottomley@Parallels.com",
    "time": "Sun Feb 19 13:52:34 2012 -0600"
  },
  "message": "[SCSI] libsas: prevent domain rediscovery competing with ata error handling\n\nlibata error handling provides for a timeout for link recovery.  libsas\nmust not rescan for previously known devices in this interval otherwise\nit may remove a device that is simply waiting for its link to recover.\nLet libata-eh make the determination of when the link is stable and\nprevent libsas (host workqueue) from taking action while this\ndetermination is pending.\n\nUsing a mutex (ha-\u003edisco_mutex) to flush and disable revalidation while\neh is running requires any discovery action that may block on eh be\nmoved to its own context outside the lock.  Probing ATA devices\nexplicitly waits on ata-eh and the cache-flush-io issued during device\nremoval may also pend awaiting eh completion.  Essentially any rphy\nadd/remove activity needs to run outside the lock.\n\nThis adds two new cleanup states for sas_unregister_domain_devices()\n\u0027allocated-but-not-probed\u0027, and \u0027flagged-for-destruction\u0027.  In the\n\u0027allocated-but-not-probed\u0027 state  dev-\u003erphy points to a rphy that is\nknown to have not been through a sas_rphy_add() event.  At domain\nteardown check if this device is still pending probe and cleanup\naccordingly.  Similarly if a device has already been queued for removal\nthen sas_unregister_domain_devices has nothing to do.\n\nSigned-off-by: Dan Williams \u003cdan.j.williams@intel.com\u003e\nSigned-off-by: James Bottomley \u003cJBottomley@Parallels.com\u003e\n",
  "tree_diff": [
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