[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>

4 files changed, 56 insertions, 21 deletions

diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 453bcb7d6b5..a2a620c3e07 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -580,6 +580,7 @@ struct mptfc_rport_info
 typedef void (*MPT_ADD_SGE)(void *pAddr, u32 flagslength, dma_addr_t dma_addr);
 typedef void (*MPT_ADD_CHAIN)(void *pAddr, u8 next, u16 length,
                 dma_addr_t dma_addr);
+typedef void (*MPT_SCHEDULE_TARGET_RESET)(void *ioc);
 
 /*
  *  Adapter Structure - pci_dev specific. Maximum: MPT_MAX_ADAPTERS
@@ -738,6 +739,7 @@ typedef struct _MPT_ADAPTER
         int                      taskmgmt_in_progress;
         u8                       taskmgmt_quiesce_io;
         u8                       ioc_reset_in_progress;
+        MPT_SCHEDULE_TARGET_RESET schedule_target_reset;
         struct work_struct       sas_persist_task;
 
         struct work_struct       fc_setup_reset_work;
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index f06b29193b4..9bd89cebb5a 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -261,10 +261,16 @@ mptctl_reply(MPT_ADAPTER *ioc, MPT_FRAME_HDR *req, MPT_FRAME_HDR *reply)
         /* We are done, issue wake up
          */
         if (ioc->ioctl_cmds.status & MPT_MGMT_STATUS_PENDING) {
-                if (req->u.hdr.Function == MPI_FUNCTION_SCSI_TASK_MGMT)
+                if (req->u.hdr.Function == MPI_FUNCTION_SCSI_TASK_MGMT) {
                         mpt_clear_taskmgmt_in_progress_flag(ioc);
-                ioc->ioctl_cmds.status &= ~MPT_MGMT_STATUS_PENDING;
-                complete(&ioc->ioctl_cmds.done);
+                        ioc->ioctl_cmds.status &= ~MPT_MGMT_STATUS_PENDING;
+                        complete(&ioc->ioctl_cmds.done);
+                        if (ioc->bus_type == SAS)
+                                ioc->schedule_target_reset(ioc);
+                } else {
+                        ioc->ioctl_cmds.status &= ~MPT_MGMT_STATUS_PENDING;
+                        complete(&ioc->ioctl_cmds.done);
+                }
         }
 
  out_continuation:
@@ -298,6 +304,8 @@ mptctl_taskmgmt_reply(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
                 mpt_clear_taskmgmt_in_progress_flag(ioc);
                 ioc->taskmgmt_cmds.status &= ~MPT_MGMT_STATUS_PENDING;
                 complete(&ioc->taskmgmt_cmds.done);
+                if (ioc->bus_type == SAS)
+                        ioc->schedule_target_reset(ioc);
                 return 1;
         }
         return 0;
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 8963f5c44c2..a9465516234 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) {
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index 5a3c10e72e4..c5c8fb811f5 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -2134,6 +2134,8 @@ mptscsih_taskmgmt_complete(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf,
                 mpt_clear_taskmgmt_in_progress_flag(ioc);
                 ioc->taskmgmt_cmds.status &= ~MPT_MGMT_STATUS_PENDING;
                 complete(&ioc->taskmgmt_cmds.done);
+                if (ioc->bus_type == SAS)
+                        ioc->schedule_target_reset(ioc);
                 return 1;
         }
         return 0;