[SCSI] mvsas: fix the buffer of rx DMA overflow bug

fix the buffer of rx DMA overflow bug.
fix default queue depth.

Signed-off-by: Ke Wei <kewei@marvell.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/mvsas.c

@@ -2240,7 +2240,7 @@ static void mvs_free(struct mvs_info *mvi)
 				  mvi->rx_fis, mvi->rx_fis_dma);
 	if (mvi->rx)
 		dma_free_coherent(&mvi->pdev->dev,
-				  sizeof(*mvi->rx) * MVS_RX_RING_SZ,
+				  sizeof(*mvi->rx) * (MVS_RX_RING_SZ + 1),
 				  mvi->rx, mvi->rx_dma);
 	if (mvi->slot)
 		dma_free_coherent(&mvi->pdev->dev,
@@ -2348,6 +2348,9 @@ static struct mvs_info *__devinit mvs_alloc(struct pci_dev *pdev,
 		return NULL;
 
 	spin_lock_init(&mvi->lock);
+#ifdef MVS_USE_TASKLET
+	tasklet_init(&mvi->tasklet, mvs_tasklet, (unsigned long)mvi);
+#endif
 	mvi->pdev = pdev;
 	mvi->chip = chip;
 
@@ -2371,6 +2374,10 @@ static struct mvs_info *__devinit mvs_alloc(struct pci_dev *pdev,
 		mvs_phy_init(mvi, i);
 		arr_phy[i] = &mvi->phy[i].sas_phy;
 		arr_port[i] = &mvi->port[i].sas_port;
+		mvi->port[i].taskfileset = MVS_ID_NOT_MAPPED;
+		mvi->port[i].wide_port_phymap = 0;
+		mvi->port[i].port_attached = 0;
+		INIT_LIST_HEAD(&mvi->port[i].list);
 	}
 
 	SHOST_TO_SAS_HA(mvi->shost) = &mvi->sas;
@@ -2387,9 +2394,10 @@ static struct mvs_info *__devinit mvs_alloc(struct pci_dev *pdev,
 	mvi->sas.sas_phy = arr_phy;
 	mvi->sas.sas_port = arr_port;
 	mvi->sas.num_phys = chip->n_phy;
-	mvi->sas.lldd_max_execute_num = MVS_CHIP_SLOT_SZ - 1;
+	mvi->sas.lldd_max_execute_num = 1;
 	mvi->sas.lldd_queue_size = MVS_QUEUE_SIZE;
-	mvi->can_queue = (MVS_CHIP_SLOT_SZ >> 1) - 1;
+	mvi->shost->can_queue = MVS_CAN_QUEUE;
+	mvi->shost->cmd_per_lun = MVS_SLOTS / mvi->sas.num_phys;
 	mvi->sas.lldd_ha = mvi;
 	mvi->sas.core.shost = mvi->shost;
 
@@ -2442,11 +2450,11 @@ static struct mvs_info *__devinit mvs_alloc(struct pci_dev *pdev,
 	memset(mvi->rx_fis, 0, MVS_RX_FISL_SZ);
 
 	mvi->rx = dma_alloc_coherent(&pdev->dev,
-				     sizeof(*mvi->rx) * MVS_RX_RING_SZ,
+				     sizeof(*mvi->rx) * (MVS_RX_RING_SZ + 1),
 				     &mvi->rx_dma, GFP_KERNEL);
 	if (!mvi->rx)
 		goto err_out;
-	memset(mvi->rx, 0, sizeof(*mvi->rx) * MVS_RX_RING_SZ);
+	memset(mvi->rx, 0, sizeof(*mvi->rx) * (MVS_RX_RING_SZ + 1));
 
 	mvi->rx[0] = cpu_to_le32(0xfff);
 	mvi->rx_cons = 0xfff;
@@ -2596,7 +2604,7 @@ static void __devinit mvs_phy_hacks(struct mvs_info *mvi)
 	mvs_cw32(regs, CMD_SAS_CTL0, tmp);
 
 	/* workaround for WDTIMEOUT , set to 550 ms */
-	mvs_cw32(regs, CMD_WD_TIMER, 0xffffff);
+	mvs_cw32(regs, CMD_WD_TIMER, 0x86470);
 
 	/* not to halt for different port op during wideport link change */
 	mvs_cw32(regs, CMD_APP_ERR_CONFIG, 0xffefbf7d);
@@ -2704,17 +2712,16 @@ static u32 mvs_is_phy_ready(struct mvs_info *mvi, int i)
 {
 	u32 tmp;
 	struct mvs_phy *phy = &mvi->phy[i];
-	struct mvs_port *port;
+	struct mvs_port *port = phy->port;;
 
 	tmp = mvs_read_phy_ctl(mvi, i);
 
 	if ((tmp & PHY_READY_MASK) && !(phy->irq_status & PHYEV_POOF)) {
-		if (!phy->port)
+		if (!port)
 			phy->phy_attached = 1;
 		return tmp;
 	}
 
-	port = phy->port;
 	if (port) {
 		if (phy->phy_type & PORT_TYPE_SAS) {
 			port->wide_port_phymap &= ~(1U << i);