Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull first round of SCSI updates from James Bottomley:
 "This is a large set of updates, mostly for drivers (qla2xxx [including
  support for new 83xx based card], qla4xxx, mpt2sas, bfa, zfcp, hpsa,
  be2iscsi, isci, lpfc, ipr, ibmvfc, ibmvscsi, megaraid_sas).

  There's also a rework for tape adding virtually unlimited numbers of
  tape drives plus a set of dif fixes for sd and a fix for a live lock
  on hot remove of SCSI devices.

  This round includes a signed tag pull of isci-for-3.6

  Signed-off-by: James Bottomley <JBottomley@Parallels.com>"

Fix up trivial conflict in drivers/scsi/qla2xxx/qla_nx.c due to new PCI
helper function use in a function that was removed by this pull.

* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (198 commits)
  [SCSI] st: remove st_mutex
  [SCSI] sd: Ensure we correctly disable devices with unknown protection type
  [SCSI] hpsa: gen8plus Smart Array IDs
  [SCSI] qla4xxx: Update driver version to 5.03.00-k1
  [SCSI] qla4xxx: Disable generating pause frames for ISP83XX
  [SCSI] qla4xxx: Fix double clearing of risc_intr for ISP83XX
  [SCSI] qla4xxx: IDC implementation for Loopback
  [SCSI] qla4xxx: update copyrights in LICENSE.qla4xxx
  [SCSI] qla4xxx: Fix panic while rmmod
  [SCSI] qla4xxx: Fail probe_adapter if IRQ allocation fails
  [SCSI] qla4xxx: Prevent MSI/MSI-X falling back to INTx for ISP82XX
  [SCSI] qla4xxx: Update idc reg in case of PCI AER
  [SCSI] qla4xxx: Fix double IDC locking in qla4_8xxx_error_recovery
  [SCSI] qla4xxx: Clear interrupt while unloading driver for ISP83XX
  [SCSI] qla4xxx: Print correct IDC version
  [SCSI] qla4xxx: Added new mbox cmd to pass driver version to FW
  [SCSI] scsi_dh_alua: Enable STPG for unavailable ports
  [SCSI] scsi_remove_target: fix softlockup regression on hot remove
  [SCSI] ibmvscsi: Fix host config length field overflow
  [SCSI] ibmvscsi: Remove backend abstraction
  ...

1 files changed, 69 insertions, 11 deletions

diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index e37f04551948..f2dd3a0a39eb 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -39,19 +39,25 @@ void zfcp_ccw_adapter_put(struct zfcp_adapter *adapter)
         spin_unlock_irqrestore(&zfcp_ccw_adapter_ref_lock, flags);
 }
 
-static int zfcp_ccw_activate(struct ccw_device *cdev)
-
+/**
+ * zfcp_ccw_activate - activate adapter and wait for it to finish
+ * @cdev: pointer to belonging ccw device
+ * @clear: Status flags to clear.
+ * @tag: s390dbf trace record tag
+ */
+static int zfcp_ccw_activate(struct ccw_device *cdev, int clear, char *tag)
 {
         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 
         if (!adapter)
                 return 0;
 
+        zfcp_erp_clear_adapter_status(adapter, clear);
         zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
-                                "ccresu2");
+                                tag);
         zfcp_erp_wait(adapter);
-        flush_work(&adapter->scan_work);
+        flush_work(&adapter->scan_work); /* ok to call even if nothing queued */
 
         zfcp_ccw_adapter_put(adapter);
 
@@ -164,26 +170,34 @@ static int zfcp_ccw_set_online(struct ccw_device *cdev)
         BUG_ON(!zfcp_reqlist_isempty(adapter->req_list));
         adapter->req_no = 0;
 
-        zfcp_ccw_activate(cdev);
+        zfcp_ccw_activate(cdev, 0, "ccsonl1");
+        /* scan for remote ports
+           either at the end of any successful adapter recovery
+           or only after the adapter recovery for setting a device online */
+        zfcp_fc_inverse_conditional_port_scan(adapter);
+        flush_work(&adapter->scan_work); /* ok to call even if nothing queued */
         zfcp_ccw_adapter_put(adapter);
         return 0;
 }
 
 /**
- * zfcp_ccw_set_offline - set_offline function of zfcp driver
+ * zfcp_ccw_offline_sync - shut down adapter and wait for it to finish
  * @cdev: pointer to belonging ccw device
+ * @set: Status flags to set.
+ * @tag: s390dbf trace record tag
  *
  * This function gets called by the common i/o layer and sets an adapter
  * into state offline.
  */
-static int zfcp_ccw_set_offline(struct ccw_device *cdev)
+static int zfcp_ccw_offline_sync(struct ccw_device *cdev, int set, char *tag)
 {
         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
 
         if (!adapter)
                 return 0;
 
-        zfcp_erp_adapter_shutdown(adapter, 0, "ccsoff1");
+        zfcp_erp_set_adapter_status(adapter, set);
+        zfcp_erp_adapter_shutdown(adapter, 0, tag);
         zfcp_erp_wait(adapter);
 
         zfcp_ccw_adapter_put(adapter);
@@ -191,6 +205,18 @@ static int zfcp_ccw_set_offline(struct ccw_device *cdev)
 }
 
 /**
+ * zfcp_ccw_set_offline - set_offline function of zfcp driver
+ * @cdev: pointer to belonging ccw device
+ *
+ * This function gets called by the common i/o layer and sets an adapter
+ * into state offline.
+ */
+static int zfcp_ccw_set_offline(struct ccw_device *cdev)
+{
+        return zfcp_ccw_offline_sync(cdev, 0, "ccsoff1");
+}
+
+/**
  * zfcp_ccw_notify - ccw notify function
  * @cdev: pointer to belonging ccw device
  * @event: indicates if adapter was detached or attached
@@ -207,6 +233,11 @@ static int zfcp_ccw_notify(struct ccw_device *cdev, int event)
 
         switch (event) {
         case CIO_GONE:
+                if (atomic_read(&adapter->status) &
+                    ZFCP_STATUS_ADAPTER_SUSPENDED) { /* notification ignore */
+                        zfcp_dbf_hba_basic("ccnigo1", adapter);
+                        break;
+                }
                 dev_warn(&cdev->dev, "The FCP device has been detached\n");
                 zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti1");
                 break;
@@ -216,6 +247,11 @@ static int zfcp_ccw_notify(struct ccw_device *cdev, int event)
                 zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti2");
                 break;
         case CIO_OPER:
+                if (atomic_read(&adapter->status) &
+                    ZFCP_STATUS_ADAPTER_SUSPENDED) { /* notification ignore */
+                        zfcp_dbf_hba_basic("ccniop1", adapter);
+                        break;
+                }
                 dev_info(&cdev->dev, "The FCP device is operational again\n");
                 zfcp_erp_set_adapter_status(adapter,
                                             ZFCP_STATUS_COMMON_RUNNING);
@@ -251,6 +287,28 @@ static void zfcp_ccw_shutdown(struct ccw_device *cdev)
         zfcp_ccw_adapter_put(adapter);
 }
 
+static int zfcp_ccw_suspend(struct ccw_device *cdev)
+{
+        zfcp_ccw_offline_sync(cdev, ZFCP_STATUS_ADAPTER_SUSPENDED, "ccsusp1");
+        return 0;
+}
+
+static int zfcp_ccw_thaw(struct ccw_device *cdev)
+{
+        /* trace records for thaw and final shutdown during suspend
+           can only be found in system dump until the end of suspend
+           but not after resume because it's based on the memory image
+           right after the very first suspend (freeze) callback */
+        zfcp_ccw_activate(cdev, 0, "ccthaw1");
+        return 0;
+}
+
+static int zfcp_ccw_resume(struct ccw_device *cdev)
+{
+        zfcp_ccw_activate(cdev, ZFCP_STATUS_ADAPTER_SUSPENDED, "ccresu1");
+        return 0;
+}
+
 struct ccw_driver zfcp_ccw_driver = {
         .driver = {
                 .owner  = THIS_MODULE,
@@ -263,7 +321,7 @@ struct ccw_driver zfcp_ccw_driver = {
         .set_offline = zfcp_ccw_set_offline,
         .notify      = zfcp_ccw_notify,
         .shutdown    = zfcp_ccw_shutdown,
-        .freeze      = zfcp_ccw_set_offline,
-        .thaw        = zfcp_ccw_activate,
-        .restore     = zfcp_ccw_activate,
+        .freeze      = zfcp_ccw_suspend,
+        .thaw        = zfcp_ccw_thaw,
+        .restore     = zfcp_ccw_resume,
 };