diff --git a/drivers/scsi/mvsas/mv_64xx.c b/drivers/scsi/mvsas/mv_64xx.c
index 10a5077b6aed..afc7f6f3a13e 100644
--- a/drivers/scsi/mvsas/mv_64xx.c
+++ b/drivers/scsi/mvsas/mv_64xx.c
@@ -132,9 +132,9 @@ static void mvs_64xx_phy_reset(struct mvs_info *mvi, u32 phy_id, int hard)
 	tmp &= ~PHYEV_RDY_CH;
 	mvs_write_port_irq_stat(mvi, phy_id, tmp);
 	tmp = mvs_read_phy_ctl(mvi, phy_id);
-	if (hard)
+	if (hard == 1)
 		tmp |= PHY_RST_HARD;
-	else
+	else if (hard == 0)
 		tmp |= PHY_RST;
 	mvs_write_phy_ctl(mvi, phy_id, tmp);
 	if (hard) {
@@ -144,6 +144,26 @@ static void mvs_64xx_phy_reset(struct mvs_info *mvi, u32 phy_id, int hard)
 	}
 }
 
+void mvs_64xx_clear_srs_irq(struct mvs_info *mvi, u8 reg_set, u8 clear_all)
+{
+	void __iomem *regs = mvi->regs;
+	u32 tmp;
+	if (clear_all) {
+		tmp = mr32(MVS_INT_STAT_SRS_0);
+		if (tmp) {
+			printk(KERN_DEBUG "check SRS 0 %08X.\n", tmp);
+			mw32(MVS_INT_STAT_SRS_0, tmp);
+		}
+	} else {
+		tmp = mr32(MVS_INT_STAT_SRS_0);
+		if (tmp &  (1 << (reg_set % 32))) {
+			printk(KERN_DEBUG "register set 0x%x was stopped.\n",
+			       reg_set);
+			mw32(MVS_INT_STAT_SRS_0, 1 << (reg_set % 32));
+		}
+	}
+}
+
 static int __devinit mvs_64xx_chip_reset(struct mvs_info *mvi)
 {
 	void __iomem *regs = mvi->regs;
@@ -761,6 +781,7 @@ const struct mvs_dispatch mvs_64xx_dispatch = {
 	mvs_write_port_irq_mask,
 	mvs_get_sas_addr,
 	mvs_64xx_command_active,
+	mvs_64xx_clear_srs_irq,
 	mvs_64xx_issue_stop,
 	mvs_start_delivery,
 	mvs_rx_update,
diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index 0940fae19d20..eed4c5c72013 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -616,6 +616,15 @@ void mvs_94xx_fix_dma(dma_addr_t buf_dma, int buf_len, int from, void *prd)
 }
 #endif
 
+/*
+ * FIXME JEJB: temporary nop clear_srs_irq to make 94xx still work
+ * with 64xx fixes
+ */
+static void mvs_94xx_clear_srs_irq(struct mvs_info *mvi, u8 reg_set,
+				   u8 clear_all)
+{
+}
+
 const struct mvs_dispatch mvs_94xx_dispatch = {
 	"mv94xx",
 	mvs_94xx_init,
@@ -640,6 +649,7 @@ const struct mvs_dispatch mvs_94xx_dispatch = {
 	mvs_write_port_irq_mask,
 	mvs_get_sas_addr,
 	mvs_94xx_command_active,
+	mvs_94xx_clear_srs_irq,
 	mvs_94xx_issue_stop,
 	mvs_start_delivery,
 	mvs_rx_update,
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index cae6b2cf492f..19ad34f381a5 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -37,6 +37,7 @@ static const struct mvs_chip_info mvs_chips[] = {
 };
 
 #define SOC_SAS_NUM 2
+#define SG_MX 64
 
 static struct scsi_host_template mvs_sht = {
 	.module			= THIS_MODULE,
@@ -53,10 +54,10 @@ static struct scsi_host_template mvs_sht = {
 	.can_queue		= 1,
 	.cmd_per_lun		= 1,
 	.this_id		= -1,
-	.sg_tablesize		= SG_ALL,
+	.sg_tablesize		= SG_MX,
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
 	.use_clustering		= ENABLE_CLUSTERING,
-	.eh_device_reset_handler	= sas_eh_device_reset_handler,
+	.eh_device_reset_handler = sas_eh_device_reset_handler,
 	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,
 	.slave_alloc		= mvs_slave_alloc,
 	.target_destroy		= sas_target_destroy,
@@ -65,19 +66,17 @@ static struct scsi_host_template mvs_sht = {
 
 static struct sas_domain_function_template mvs_transport_ops = {
 	.lldd_dev_found 	= mvs_dev_found,
-	.lldd_dev_gone	= mvs_dev_gone,
-
+	.lldd_dev_gone		= mvs_dev_gone,
 	.lldd_execute_task	= mvs_queue_command,
 	.lldd_control_phy	= mvs_phy_control,
 
 	.lldd_abort_task	= mvs_abort_task,
 	.lldd_abort_task_set    = mvs_abort_task_set,
 	.lldd_clear_aca         = mvs_clear_aca,
-       .lldd_clear_task_set    = mvs_clear_task_set,
+	.lldd_clear_task_set    = mvs_clear_task_set,
 	.lldd_I_T_nexus_reset	= mvs_I_T_nexus_reset,
 	.lldd_lu_reset 		= mvs_lu_reset,
 	.lldd_query_task	= mvs_query_task,
-
 	.lldd_port_formed	= mvs_port_formed,
 	.lldd_port_deformed     = mvs_port_deformed,
 
@@ -213,7 +212,7 @@ static irqreturn_t mvs_interrupt(int irq, void *opaque)
 
 static int __devinit mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
 {
-	int i, slot_nr;
+	int i = 0, slot_nr;
 
 	if (mvi->flags & MVF_FLAG_SOC)
 		slot_nr = MVS_SOC_SLOTS;
@@ -232,6 +231,7 @@ static int __devinit mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
 		mvi->devices[i].dev_type = NO_DEVICE;
 		mvi->devices[i].device_id = i;
 		mvi->devices[i].dev_status = MVS_DEV_NORMAL;
+		init_timer(&mvi->devices[i].timer);
 	}
 
 	/*
@@ -437,6 +437,7 @@ static int __devinit mvs_prep_sas_ha_init(struct Scsi_Host *shost,
 
 	sha->sas_phy = arr_phy;
 	sha->sas_port = arr_port;
+	sha->core.shost = shost;
 
 	sha->lldd_ha = kzalloc(sizeof(struct mvs_prv_info), GFP_KERNEL);
 	if (!sha->lldd_ha)
@@ -574,6 +575,10 @@ static int __devinit mvs_pci_init(struct pci_dev *pdev,
 		}
 		nhost++;
 	} while (nhost < chip->n_host);
+#ifdef MVS_USE_TASKLET
+	tasklet_init(&mv_tasklet, mvs_tasklet,
+		     (unsigned long)SHOST_TO_SAS_HA(shost));
+#endif
 
 	mvs_post_sas_ha_init(shost, chip);
 
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 0d2138641214..f5e321791903 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -259,8 +259,6 @@ static inline void mvs_free_reg_set(struct mvs_info *mvi,
 		mv_printk("device has been free.\n");
 		return;
 	}
-	if (dev->runing_req != 0)
-		return;
 	if (dev->taskfileset == MVS_ID_NOT_MAPPED)
 		return;
 	MVS_CHIP_DISP->free_reg_set(mvi, &dev->taskfileset);
@@ -762,8 +760,6 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
 	}
 	if (is_tmf)
 		flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
-	else
-		flags |= (MCH_SSP_FR_CMD << MCH_SSP_FR_TYPE_SHIFT);
 	hdr->flags = cpu_to_le32(flags | (tei->n_elem << MCH_PRD_LEN_SHIFT));
 	hdr->tags = cpu_to_le32(tag);
 	hdr->data_len = cpu_to_le32(task->total_xfer_len);
@@ -878,14 +874,15 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 	struct mvs_slot_info *slot;
 	u32 tag = 0xdeadbeef, rc, n_elem = 0;
 	u32 n = num, pass = 0;
-	unsigned long flags = 0;
+	unsigned long flags = 0,  flags_libsas = 0;
 
 	if (!dev->port) {
 		struct task_status_struct *tsm = &t->task_status;
 
 		tsm->resp = SAS_TASK_UNDELIVERED;
 		tsm->stat = SAS_PHY_DOWN;
-		t->task_done(t);
+		if (dev->dev_type != SATA_DEV)
+			t->task_done(t);
 		return 0;
 	}
 
@@ -910,12 +907,25 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 		else
 			tei.port = &mvi->port[dev->port->id];
 
-		if (!tei.port->port_attached) {
+		if (tei.port && !tei.port->port_attached) {
 			if (sas_protocol_ata(t->task_proto)) {
+				struct task_status_struct *ts = &t->task_status;
+
 				mv_dprintk("port %d does not"
 					"attached device.\n", dev->port->id);
-				rc = SAS_PHY_DOWN;
-				goto out_done;
+				ts->stat = SAS_PROTO_RESPONSE;
+				ts->stat = SAS_PHY_DOWN;
+				spin_unlock_irqrestore(dev->sata_dev.ap->lock,
+						       flags_libsas);
+				spin_unlock_irqrestore(&mvi->lock, flags);
+				t->task_done(t);
+				spin_lock_irqsave(&mvi->lock, flags);
+				spin_lock_irqsave(dev->sata_dev.ap->lock,
+						  flags_libsas);
+				if (n > 1)
+					t = list_entry(t->list.next,
+						       struct sas_task, list);
+				continue;
 			} else {
 				struct task_status_struct *ts = &t->task_status;
 				ts->resp = SAS_TASK_UNDELIVERED;
@@ -973,8 +983,8 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 			break;
 		default:
 			dev_printk(KERN_ERR, mvi->dev,
-				"unknown sas_task proto: 0x%x\n",
-				t->task_proto);
+				   "unknown sas_task proto: 0x%x\n",
+				   t->task_proto);
 			rc = -EINVAL;
 			break;
 		}
@@ -993,11 +1003,15 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
 		spin_unlock(&t->task_state_lock);
 
 		mvs_hba_memory_dump(mvi, tag, t->task_proto);
-		mvi_dev->runing_req++;
+		mvi_dev->running_req++;
 		++pass;
 		mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
 		if (n > 1)
 			t = list_entry(t->list.next, struct sas_task, list);
+		if (likely(pass))
+			MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
+						      (MVS_CHIP_SLOT_SZ - 1));
+
 	} while (--n);
 	rc = 0;
 	goto out_done;
@@ -1012,10 +1026,6 @@ err_out:
 			dma_unmap_sg(mvi->dev, t->scatter, n_elem,
 				     t->data_dir);
 out_done:
-	if (likely(pass)) {
-		MVS_CHIP_DISP->start_delivery(mvi,
-			(mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
-	}
 	spin_unlock_irqrestore(&mvi->lock, flags);
 	return rc;
 }
@@ -1187,7 +1197,7 @@ void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st)
 				MVS_CHIP_DISP->phy_reset(mvi, i, 0);
 				goto out_done;
 			}
-		}		else if (phy->phy_type & PORT_TYPE_SAS
+		}	else if (phy->phy_type & PORT_TYPE_SAS
 			|| phy->att_dev_info & PORT_SSP_INIT_MASK) {
 			phy->phy_attached = 1;
 			phy->identify.device_type =
@@ -1256,7 +1266,20 @@ static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
 
 static void mvs_port_notify_deformed(struct asd_sas_phy *sas_phy, int lock)
 {
-	/*Nothing*/
+	struct domain_device *dev;
+	struct mvs_phy *phy = sas_phy->lldd_phy;
+	struct mvs_info *mvi = phy->mvi;
+	struct asd_sas_port *port = sas_phy->port;
+	int phy_no = 0;
+
+	while (phy != &mvi->phy[phy_no]) {
+		phy_no++;
+		if (phy_no >= MVS_MAX_PHYS)
+			return;
+	}
+	list_for_each_entry(dev, &port->dev_list, dev_list_node)
+		mvs_do_release_task(phy->mvi, phy_no, NULL);
+
 }
 
 
@@ -1316,6 +1339,7 @@ int mvs_dev_found_notify(struct domain_device *dev, int lock)
 		goto found_out;
 	}
 	dev->lldd_dev = mvi_device;
+	mvi_device->dev_status = MVS_DEV_NORMAL;
 	mvi_device->dev_type = dev->dev_type;
 	mvi_device->mvi_info = mvi;
 	if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
@@ -1351,18 +1375,18 @@ int mvs_dev_found(struct domain_device *dev)
 	return mvs_dev_found_notify(dev, 1);
 }
 
-void mvs_dev_gone_notify(struct domain_device *dev, int lock)
+void mvs_dev_gone_notify(struct domain_device *dev)
 {
 	unsigned long flags = 0;
 	struct mvs_device *mvi_dev = dev->lldd_dev;
 	struct mvs_info *mvi = mvi_dev->mvi_info;
 
-	if (lock)
-		spin_lock_irqsave(&mvi->lock, flags);
+	spin_lock_irqsave(&mvi->lock, flags);
 
 	if (mvi_dev) {
 		mv_dprintk("found dev[%d:%x] is gone.\n",
 			mvi_dev->device_id, mvi_dev->dev_type);
+		mvs_release_task(mvi, dev);
 		mvs_free_reg_set(mvi, mvi_dev);
 		mvs_free_dev(mvi_dev);
 	} else {
@@ -1370,14 +1394,13 @@ void mvs_dev_gone_notify(struct domain_device *dev, int lock)
 	}
 	dev->lldd_dev = NULL;
 
-	if (lock)
-		spin_unlock_irqrestore(&mvi->lock, flags);
+	spin_unlock_irqrestore(&mvi->lock, flags);
 }
 
 
 void mvs_dev_gone(struct domain_device *dev)
 {
-	mvs_dev_gone_notify(dev, 1);
+	mvs_dev_gone_notify(dev);
 }
 
 static  struct sas_task *mvs_alloc_task(void)
@@ -1540,7 +1563,7 @@ int mvs_lu_reset(struct domain_device *dev, u8 *lun)
 		num = mvs_find_dev_phyno(dev, phyno);
 		spin_lock_irqsave(&mvi->lock, flags);
 		for (i = 0; i < num; i++)
-			mvs_release_task(mvi, phyno[i], dev);
+			mvs_release_task(mvi, dev);
 		spin_unlock_irqrestore(&mvi->lock, flags);
 	}
 	/* If failed, fall-through I_T_Nexus reset */
@@ -1552,8 +1575,8 @@ int mvs_lu_reset(struct domain_device *dev, u8 *lun)
 int mvs_I_T_nexus_reset(struct domain_device *dev)
 {
 	unsigned long flags;
-	int i, phyno[WIDE_PORT_MAX_PHY], num , rc = TMF_RESP_FUNC_FAILED;
-	struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
+	int rc = TMF_RESP_FUNC_FAILED;
+    struct mvs_device * mvi_dev = (struct mvs_device *)dev->lldd_dev;
 	struct mvs_info *mvi = mvi_dev->mvi_info;
 
 	if (mvi_dev->dev_status != MVS_DEV_EH)
@@ -1563,10 +1586,8 @@ int mvs_I_T_nexus_reset(struct domain_device *dev)
 		__func__, mvi_dev->device_id, rc);
 
 	/* housekeeper */
-	num = mvs_find_dev_phyno(dev, phyno);
 	spin_lock_irqsave(&mvi->lock, flags);
-	for (i = 0; i < num; i++)
-		mvs_release_task(mvi, phyno[i], dev);
+	mvs_release_task(mvi, dev);
 	spin_unlock_irqrestore(&mvi->lock, flags);
 
 	return rc;
@@ -1603,6 +1624,9 @@ int mvs_query_task(struct sas_task *task)
 		case TMF_RESP_FUNC_FAILED:
 		case TMF_RESP_FUNC_COMPLETE:
 			break;
+		default:
+			rc = TMF_RESP_FUNC_COMPLETE;
+			break;
 		}
 	}
 	mv_printk("%s:rc= %d\n", __func__, rc);
@@ -1621,8 +1645,11 @@ int mvs_abort_task(struct sas_task *task)
 	unsigned long flags;
 	u32 tag;
 
-	if (mvi->exp_req)
-		mvi->exp_req--;
+	if (!mvi_dev) {
+		mv_printk("%s:%d TMF_RESP_FUNC_FAILED\n", __func__, __LINE__);
+		rc = TMF_RESP_FUNC_FAILED;
+	}
+
 	spin_lock_irqsave(&task->task_state_lock, flags);
 	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
 		spin_unlock_irqrestore(&task->task_state_lock, flags);
@@ -1630,6 +1657,7 @@ int mvs_abort_task(struct sas_task *task)
 		goto out;
 	}
 	spin_unlock_irqrestore(&task->task_state_lock, flags);
+	mvi_dev->dev_status = MVS_DEV_EH;
 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 		struct scsi_cmnd * cmnd = (struct scsi_cmnd *)task->uldd_task;
 
@@ -1654,12 +1682,31 @@ int mvs_abort_task(struct sas_task *task)
 			if (task->lldd_task) {
 				slot = task->lldd_task;
 				slot_no = (u32) (slot - mvi->slot_info);
+				spin_lock_irqsave(&mvi->lock, flags);
 				mvs_slot_complete(mvi, slot_no, 1);
+				spin_unlock_irqrestore(&mvi->lock, flags);
 			}
 		}
+
 	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
 		task->task_proto & SAS_PROTOCOL_STP) {
 		/* to do free register_set */
+		if (SATA_DEV == dev->dev_type) {
+			struct mvs_slot_info *slot = task->lldd_task;
+			struct task_status_struct *tstat;
+			u32 slot_idx = (u32)(slot - mvi->slot_info);
+			tstat = &task->task_status;
+			mv_dprintk(KERN_DEBUG "mv_abort_task() mvi=%p task=%p "
+				   "slot=%p slot_idx=x%x\n",
+				   mvi, task, slot, slot_idx);
+			tstat->stat = SAS_ABORTED_TASK;
+			if (mvi_dev && mvi_dev->running_req)
+				mvi_dev->running_req--;
+			if (sas_protocol_ata(task->task_proto))
+				mvs_free_reg_set(mvi, mvi_dev);
+			mvs_slot_task_free(mvi, task, slot, slot_idx);
+			return -1;
+		}
 	} else {
 		/* SMP */
 
@@ -1717,8 +1764,13 @@ static int mvs_sata_done(struct mvs_info *mvi, struct sas_task *task,
 	       SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset),
 	       sizeof(struct dev_to_host_fis));
 	tstat->buf_valid_size = sizeof(*resp);
-	if (unlikely(err))
-		stat = SAS_PROTO_RESPONSE;
+	if (unlikely(err)) {
+		if (unlikely(err & CMD_ISS_STPD))
+			stat = SAS_OPEN_REJECT;
+		else
+			stat = SAS_PROTO_RESPONSE;
+       }
+
 	return stat;
 }
 
@@ -1753,9 +1805,7 @@ static int mvs_slot_err(struct mvs_info *mvi, struct sas_task *task,
 			mv_printk("find reserved error, why?\n");
 
 		task->ata_task.use_ncq = 0;
-		stat = SAS_PROTO_RESPONSE;
-		mvs_sata_done(mvi, task, slot_idx, 1);
-
+		mvs_sata_done(mvi, task, slot_idx, err_dw0);
 	}
 		break;
 	default:
@@ -1772,18 +1822,20 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 	struct sas_task *task = slot->task;
 	struct mvs_device *mvi_dev = NULL;
 	struct task_status_struct *tstat;
+	struct domain_device *dev;
+	u32 aborted;
 
-	bool aborted;
 	void *to;
 	enum exec_status sts;
 
 	if (mvi->exp_req)
 		mvi->exp_req--;
-	if (unlikely(!task || !task->lldd_task))
+	if (unlikely(!task || !task->lldd_task || !task->dev))
 		return -1;
 
 	tstat = &task->task_status;
-	mvi_dev = task->dev->lldd_dev;
+	dev = task->dev;
+	mvi_dev = dev->lldd_dev;
 
 	mvs_hba_cq_dump(mvi);
 
@@ -1800,8 +1852,8 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 
 	if (unlikely(aborted)) {
 		tstat->stat = SAS_ABORTED_TASK;
-		if (mvi_dev)
-			mvi_dev->runing_req--;
+		if (mvi_dev && mvi_dev->running_req)
+			mvi_dev->running_req--;
 		if (sas_protocol_ata(task->task_proto))
 			mvs_free_reg_set(mvi, mvi_dev);
 
@@ -1809,24 +1861,17 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 		return -1;
 	}
 
-	if (unlikely(!mvi_dev || !slot->port->port_attached || flags)) {
-		mv_dprintk("port has not device.\n");
+	if (unlikely(!mvi_dev || flags)) {
+		if (!mvi_dev)
+			mv_dprintk("port has not device.\n");
 		tstat->stat = SAS_PHY_DOWN;
 		goto out;
 	}
 
-	/*
-	if (unlikely((rx_desc & RXQ_ERR) || (*(u64 *) slot->response))) {
-		 mv_dprintk("Find device[%016llx] RXQ_ERR %X,
-		 err info:%016llx\n",
-		 SAS_ADDR(task->dev->sas_addr),
-		 rx_desc, (u64)(*(u64 *) slot->response));
-	}
-	*/
-
 	/* error info record present */
 	if (unlikely((rx_desc & RXQ_ERR) && (*(u64 *) slot->response))) {
 		tstat->stat = mvs_slot_err(mvi, task, slot_idx);
+		tstat->resp = SAS_TASK_COMPLETE;
 		goto out;
 	}
 
@@ -1868,11 +1913,16 @@ int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags)
 		tstat->stat = SAM_CHECK_COND;
 		break;
 	}
+	if (!slot->port->port_attached) {
+		mv_dprintk("port %d has removed.\n", slot->port->sas_port.id);
+		tstat->stat = SAS_PHY_DOWN;
+	}
+
 
 out:
-	if (mvi_dev) {
-		mvi_dev->runing_req--;
-		if (sas_protocol_ata(task->task_proto))
+	if (mvi_dev && mvi_dev->running_req) {
+		mvi_dev->running_req--;
+		if (sas_protocol_ata(task->task_proto) && !mvi_dev->running_req)
 			mvs_free_reg_set(mvi, mvi_dev);
 	}
 	mvs_slot_task_free(mvi, task, slot, slot_idx);
@@ -1888,10 +1938,10 @@ out:
 	return sts;
 }
 
-void mvs_release_task(struct mvs_info *mvi,
+void mvs_do_release_task(struct mvs_info *mvi,
 		int phy_no, struct domain_device *dev)
 {
-	int i = 0; u32 slot_idx;
+	u32 slot_idx;
 	struct mvs_phy *phy;
 	struct mvs_port *port;
 	struct mvs_slot_info *slot, *slot2;
@@ -1900,6 +1950,10 @@ void mvs_release_task(struct mvs_info *mvi,
 	port = phy->port;
 	if (!port)
 		return;
+	/* clean cmpl queue in case request is already finished */
+	mvs_int_rx(mvi, false);
+
+
 
 	list_for_each_entry_safe(slot, slot2, &port->list, entry) {
 		struct sas_task *task;
@@ -1911,18 +1965,22 @@ void mvs_release_task(struct mvs_info *mvi,
 
 		mv_printk("Release slot [%x] tag[%x], task [%p]:\n",
 			slot_idx, slot->slot_tag, task);
-
-		if (task->task_proto & SAS_PROTOCOL_SSP) {
-			mv_printk("attached with SSP task CDB[");
-			for (i = 0; i < 16; i++)
-				mv_printk(" %02x", task->ssp_task.cdb[i]);
-			mv_printk(" ]\n");
-		}
+		MVS_CHIP_DISP->command_active(mvi, slot_idx);
 
 		mvs_slot_complete(mvi, slot_idx, 1);
 	}
 }
 
+void mvs_release_task(struct mvs_info *mvi,
+		      struct domain_device *dev)
+{
+	int i, phyno[WIDE_PORT_MAX_PHY], num;
+	/* housekeeper */
+	num = mvs_find_dev_phyno(dev, phyno);
+	for (i = 0; i < num; i++)
+		mvs_do_release_task(mvi, phyno[i], dev);
+}
+
 static void mvs_phy_disconnected(struct mvs_phy *phy)
 {
 	phy->phy_attached = 0;
@@ -2029,16 +2087,18 @@ void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
 	* we need check the interrupt status which belongs to per port.
 	*/
 
-	if (phy->irq_status & PHYEV_DCDR_ERR)
+	if (phy->irq_status & PHYEV_DCDR_ERR) {
 		mv_dprintk("port %d STP decoding error.\n",
-		phy_no+mvi->id*mvi->chip->n_phy);
+		phy_no + mvi->id*mvi->chip->n_phy);
+	}
 
 	if (phy->irq_status & PHYEV_POOF) {
 		if (!(phy->phy_event & PHY_PLUG_OUT)) {
 			int dev_sata = phy->phy_type & PORT_TYPE_SATA;
 			int ready;
-			mvs_release_task(mvi, phy_no, NULL);
+			mvs_do_release_task(mvi, phy_no, NULL);
 			phy->phy_event |= PHY_PLUG_OUT;
+			MVS_CHIP_DISP->clear_srs_irq(mvi, 0, 1);
 			mvs_handle_event(mvi,
 				(void *)(unsigned long)phy_no,
 				PHY_PLUG_EVENT);
@@ -2085,6 +2145,11 @@ void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
 							phy_no, tmp);
 			}
 			mvs_update_phyinfo(mvi, phy_no, 0);
+			if (phy->phy_type & PORT_TYPE_SAS) {
+				MVS_CHIP_DISP->phy_reset(mvi, phy_no, 2);
+				mdelay(10);
+			}
+
 			mvs_bytes_dmaed(mvi, phy_no);
 			/* whether driver is going to handle hot plug */
 			if (phy->phy_event & PHY_PLUG_OUT) {
diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h
index 885858bcc403..77ddc7c1e5f2 100644
--- a/drivers/scsi/mvsas/mv_sas.h
+++ b/drivers/scsi/mvsas/mv_sas.h
@@ -39,6 +39,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <scsi/libsas.h>
+#include <scsi/scsi.h>
 #include <scsi/scsi_tcq.h>
 #include <scsi/sas_ata.h>
 #include <linux/version.h>
@@ -49,7 +50,7 @@
 #define _MV_DUMP		0
 #define MVS_ID_NOT_MAPPED	0x7f
 /* #define DISABLE_HOTPLUG_DMA_FIX */
-#define MAX_EXP_RUNNING_REQ	2
+// #define MAX_EXP_RUNNING_REQ	2
 #define WIDE_PORT_MAX_PHY		4
 #define	MV_DISABLE_NCQ	0
 #define mv_printk(fmt, arg ...)	\
@@ -129,6 +130,7 @@ struct mvs_dispatch {
 
 	void (*get_sas_addr)(void *buf, u32 buflen);
 	void (*command_active)(struct mvs_info *mvi, u32 slot_idx);
+	void (*clear_srs_irq)(struct mvs_info *mvi, u8 reg_set, u8 clear_all);
 	void (*issue_stop)(struct mvs_info *mvi, enum mvs_port_type type,
 				u32 tfs);
 	void (*start_delivery)(struct mvs_info *mvi, u32 tx);
@@ -236,9 +238,10 @@ struct mvs_device {
 	enum sas_dev_type dev_type;
 	struct mvs_info *mvi_info;
 	struct domain_device *sas_device;
+	struct timer_list timer;
 	u32 attached_phy;
 	u32 device_id;
-	u32 runing_req;
+	u32 running_req;
 	u8 taskfileset;
 	u8 dev_status;
 	u16 reserved;
@@ -397,7 +400,9 @@ int mvs_lu_reset(struct domain_device *dev, u8 *lun);
 int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags);
 int mvs_I_T_nexus_reset(struct domain_device *dev);
 int mvs_query_task(struct sas_task *task);
-void mvs_release_task(struct mvs_info *mvi, int phy_no,
+void mvs_release_task(struct mvs_info *mvi,
+			struct domain_device *dev);
+void mvs_do_release_task(struct mvs_info *mvi, int phy_no,
 			struct domain_device *dev);
 void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events);
 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st);