[SCSI] mptfusion: schedule_target_reset from all Reset context

Issue:
target reset will be queued to driver's internal queue to get schedule
later. When driver add target into internal target_reset queue we will block IOs
on those target using scsi midlayer API. Now due to some cause driver is not
executing those target_reset list and it is always in block state.

Changes:
now we are clearing target_reset queue from all other Callback context
instead of only DeviceReset context.Now wherever driver is clearing
taskmgmt_in_progress flag it is considering target_reset queue cleanup
also.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 41 insertions, 18 deletions

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 8963f5c44c23..a94655162347 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -126,6 +126,7 @@ static void mptsas_scan_sas_topology(MPT_ADAPTER *ioc);
 static void mptsas_broadcast_primative_work(struct fw_event_work *fw_event);
 static void mptsas_handle_queue_full_event(struct fw_event_work *fw_event);
 static void mptsas_volume_delete(MPT_ADAPTER *ioc, u8 id);
+void    mptsas_schedule_target_reset(void *ioc);
 
 static void mptsas_print_phy_data(MPT_ADAPTER *ioc,
                                         MPI_SAS_IO_UNIT0_PHY_DATA *phy_data)
@@ -1139,6 +1140,44 @@ mptsas_target_reset_queue(MPT_ADAPTER *ioc,
 }
 
 /**
+ * mptsas_schedule_target_reset- send pending target reset
+ * @iocp: per adapter object
+ *
+ * This function will delete scheduled target reset from the list and
+ * try to send next target reset. This will be called from completion
+ * context of any Task managment command.
+ */
+
+void
+mptsas_schedule_target_reset(void *iocp)
+{
+        MPT_ADAPTER *ioc = (MPT_ADAPTER *)(iocp);
+        MPT_SCSI_HOST   *hd = shost_priv(ioc->sh);
+        struct list_head *head = &hd->target_reset_list;
+        struct mptsas_target_reset_event        *target_reset_list;
+        u8              id, channel;
+        /*
+         * issue target reset to next device in the queue
+         */
+
+        head = &hd->target_reset_list;
+        if (list_empty(head))
+                return;
+
+        target_reset_list = list_entry(head->next,
+                struct mptsas_target_reset_event, list);
+
+        id = target_reset_list->sas_event_data.TargetID;
+        channel = target_reset_list->sas_event_data.Bus;
+        target_reset_list->time_count = jiffies;
+
+        if (mptsas_target_reset(ioc, channel, id))
+                target_reset_list->target_reset_issued = 1;
+        return;
+}
+
+
+/**
  *      mptsas_taskmgmt_complete - complete SAS task management function
  *      @ioc: Pointer to MPT_ADAPTER structure
  *
@@ -1227,23 +1266,7 @@ mptsas_taskmgmt_complete(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
                         &target_reset_list->sas_event_data);
 
 
-        /*
-         * issue target reset to next device in the queue
-         */
-
-        head = &hd->target_reset_list;
-        if (list_empty(head))
-                return 1;
-
-        target_reset_list = list_entry(head->next, struct mptsas_target_reset_event,
-            list);
-
-        id = target_reset_list->sas_event_data.TargetID;
-        channel = target_reset_list->sas_event_data.Bus;
-        target_reset_list->time_count = jiffies;
-
-        if (mptsas_target_reset(ioc, channel, id))
-                target_reset_list->target_reset_issued = 1;
+        ioc->schedule_target_reset(ioc);
 
         return 1;
 }
@@ -4961,7 +4984,7 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         ioc->DoneCtx = mptsasDoneCtx;
         ioc->TaskCtx = mptsasTaskCtx;
         ioc->InternalCtx = mptsasInternalCtx;
-
+        ioc->schedule_target_reset = &mptsas_schedule_target_reset;
         /*  Added sanity check on readiness of the MPT adapter.
          */
         if (ioc->last_state != MPI_IOC_STATE_OPERATIONAL) {