[SCSI] mvsas: check hd whether unplugged

if unplugged, driver's queuecommand function will return SAS_PHY_DOWN.
task->lldd_task is used for saving its slot info.

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

1 files changed, 45 insertions, 31 deletions

diff --git a/drivers/scsi/mvsas.c b/drivers/scsi/mvsas.c
index f302970f6f2d..ebfe1649443a 100644
--- a/drivers/scsi/mvsas.c
+++ b/drivers/scsi/mvsas.c
@@ -1784,15 +1784,19 @@ static u8 mvs_assign_reg_set(struct mvs_info *mvi, struct mvs_port *port)
         return MVS_ID_NOT_MAPPED;
 }
 
-static u32 mvs_get_ncq_tag(struct sas_task *task)
+static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
 {
-        u32 tag = 0;
         struct ata_queued_cmd *qc = task->uldd_task;
 
-        if (qc)
-                tag = qc->tag;
+        if (qc) {
+                if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
+                        qc->tf.command == ATA_CMD_FPDMA_READ) {
+                        *tag = qc->tag;
+                        return 1;
+                }
+        }
 
-        return tag;
+        return 0;
 }
 
 static int mvs_task_prep_ata(struct mvs_info *mvi,
@@ -1836,11 +1840,9 @@ static int mvs_task_prep_ata(struct mvs_info *mvi,
         hdr->flags = cpu_to_le32(flags);
 
         /* FIXME: the low order order 5 bits for the TAG if enable NCQ */
-        if (task->ata_task.use_ncq) {
-                hdr->tags = cpu_to_le32(mvs_get_ncq_tag(task));
-                /*Fill in task file */
-                task->ata_task.fis.sector_count = hdr->tags << 3;
-        } else
+        if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr->tags))
+                task->ata_task.fis.sector_count |= hdr->tags << 3;
+        else
                 hdr->tags = cpu_to_le32(tag);
         hdr->data_len = cpu_to_le32(task->total_xfer_len);
 
@@ -1933,13 +1935,16 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
         u32 flags;
         u32 resp_len, req_len, i, tag = tei->tag;
         const u32 max_resp_len = SB_RFB_MAX;
+        u8 phy_mask;
 
         slot = &mvi->slot_info[tag];
 
+        phy_mask = (port->wide_port_phymap) ? port->wide_port_phymap :
+                task->dev->port->phy_mask;
         slot->tx = mvi->tx_prod;
         mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
                                 (TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
-                                (port->wide_port_phymap << TXQ_PHY_SHIFT));
+                                (phy_mask << TXQ_PHY_SHIFT));
 
         flags = MCH_RETRY;
         if (task->ssp_task.enable_first_burst) {
@@ -2040,22 +2045,32 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
         void __iomem *regs = mvi->regs;
         struct mvs_task_exec_info tei;
         struct sas_task *t = task;
+        struct mvs_slot_info *slot;
         u32 tag = 0xdeadbeef, rc, n_elem = 0;
         unsigned long flags;
         u32 n = num, pass = 0;
 
         spin_lock_irqsave(&mvi->lock, flags);
-
         do {
+                dev = t->dev;
                 tei.port = &mvi->port[dev->port->id];
 
                 if (!tei.port->port_attached) {
-                        struct task_status_struct *ts = &t->task_status;
-                        ts->stat = SAS_PHY_DOWN;
-                        t->task_done(t);
-                        rc = 0;
-                        goto exec_exit;
+                        if (sas_protocol_ata(t->task_proto)) {
+                                rc = SAS_PHY_DOWN;
+                                goto out_done;
+                        } else {
+                                struct task_status_struct *ts = &t->task_status;
+                                ts->resp = SAS_TASK_UNDELIVERED;
+                                ts->stat = SAS_PHY_DOWN;
+                                t->task_done(t);
+                                if (n > 1)
+                                        t = list_entry(t->list.next,
+                                                        struct sas_task, list);
+                                continue;
+                        }
                 }
+
                 if (!sas_protocol_ata(t->task_proto)) {
                         if (t->num_scatter) {
                                 n_elem = pci_map_sg(mvi->pdev, t->scatter,
@@ -2074,9 +2089,10 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
                 if (rc)
                         goto err_out;
 
-                mvi->slot_info[tag].task = t;
-                mvi->slot_info[tag].n_elem = n_elem;
-                memset(mvi->slot_info[tag].buf, 0, MVS_SLOT_BUF_SZ);
+                slot = &mvi->slot_info[tag];
+                t->lldd_task = NULL;
+                slot->n_elem = n_elem;
+                memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
                 tei.task = t;
                 tei.hdr = &mvi->slot[tag];
                 tei.tag = tag;
@@ -2105,28 +2121,26 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
                 if (rc)
                         goto err_out_tag;
 
+                slot->task = t;
+                slot->port = tei.port;
+                t->lldd_task = (void *) slot;
+                list_add_tail(&slot->list, &slot->port->list);
                 /* TODO: select normal or high priority */
 
                 spin_lock(&t->task_state_lock);
                 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
                 spin_unlock(&t->task_state_lock);
 
-                if (n == 1) {
-                        spin_unlock_irqrestore(&mvi->lock, flags);
-                        mw32(TX_PROD_IDX, mvi->tx_prod);
-                }
                 mvs_hba_memory_dump(mvi, tag, t->task_proto);
 
                 ++pass;
                 mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
-
-                if (n == 1)
-                        break;
-
-                t = list_entry(t->list.next, struct sas_task, list);
+                if (n > 1)
+                        t = list_entry(t->list.next, struct sas_task, list);
         } while (--n);
 
-        return 0;
+        rc = 0;
+        goto out_done;
 
 err_out_tag:
         mvs_tag_free(mvi, tag);
@@ -2136,7 +2150,7 @@ err_out:
                 if (n_elem)
                         pci_unmap_sg(mvi->pdev, t->scatter, n_elem,
                                      t->data_dir);
-exec_exit:
+out_done:
         if (pass)
                 mw32(TX_PROD_IDX, (mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
         spin_unlock_irqrestore(&mvi->lock, flags);