[PATCH] libata: use dummy port for stolen legacy ports

Use dummy port for stolen legacy ports.  This makes ap->port_no always
equal ap->hard_port_no.

Signed-off-by: Tejun Heo <htejun@gmail.com>

2 files changed, 17 insertions, 26 deletions

diff --git a/drivers/scsi/libata-bmdma.c b/drivers/scsi/libata-bmdma.c
index e694f6075c3b..158f62dbf21b 100644
--- a/drivers/scsi/libata-bmdma.c
+++ b/drivers/scsi/libata-bmdma.c
@@ -872,50 +872,43 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
         struct ata_probe_ent *probe_ent;
         unsigned long bmdma = pci_resource_start(pdev, 4);
 
-        int port_num = 0;
-
         probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
         if (!probe_ent)
                 return NULL;
 
-        probe_ent->legacy_mode = 1;
-        probe_ent->hard_port_no = 0;
+        probe_ent->n_ports = 2;
         probe_ent->private_data = port[0]->private_data;
 
         if (port_mask & ATA_PORT_PRIMARY) {
                 probe_ent->irq = 14;
-                probe_ent->port[port_num].cmd_addr = ATA_PRIMARY_CMD;
-                probe_ent->port[port_num].altstatus_addr =
-                probe_ent->port[port_num].ctl_addr = ATA_PRIMARY_CTL;
+                probe_ent->port[0].cmd_addr = ATA_PRIMARY_CMD;
+                probe_ent->port[0].altstatus_addr =
+                probe_ent->port[0].ctl_addr = ATA_PRIMARY_CTL;
                 if (bmdma) {
                         probe_ent->port[0].bmdma_addr = bmdma;
                         if (inb(bmdma + 2) & 0x80)
                                 probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
                 }
-                ata_std_ports(&probe_ent->port[port_num]);
-                port_num ++;
-        }
+                ata_std_ports(&probe_ent->port[0]);
+        } else
+                probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
+
         if (port_mask & ATA_PORT_SECONDARY) {
-                if (port_num == 1)
+                if (probe_ent->irq)
                         probe_ent->irq2 = 15;
-                else {
-                        /* Secondary only. IRQ 15 only and "first" port is port 1 */
+                else
                         probe_ent->irq = 15;
-                        probe_ent->hard_port_no = 1;
-                }
-                probe_ent->port[port_num].cmd_addr = ATA_SECONDARY_CMD;
-                probe_ent->port[port_num].altstatus_addr =
-                probe_ent->port[port_num].ctl_addr = ATA_SECONDARY_CTL;
+                probe_ent->port[1].cmd_addr = ATA_SECONDARY_CMD;
+                probe_ent->port[1].altstatus_addr =
+                probe_ent->port[1].ctl_addr = ATA_SECONDARY_CTL;
                 if (bmdma) {
-                        probe_ent->port[port_num].bmdma_addr = bmdma + 8;
+                        probe_ent->port[1].bmdma_addr = bmdma + 8;
                         if (inb(bmdma + 10) & 0x80)
                                 probe_ent->host_set_flags |= ATA_HOST_SIMPLEX;
                 }
-                ata_std_ports(&probe_ent->port[port_num]);
-                port_num ++;
-        }
-
-        probe_ent->n_ports = port_num;
+                ata_std_ports(&probe_ent->port[1]);
+        } else
+                probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
 
         return probe_ent;
 }
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index f2e7e2f13db9..2ef86b4e7f6d 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -5224,8 +5224,6 @@ void ata_port_init(struct ata_port *ap, struct ata_host_set *host_set,
         ap->dev = ent->dev;
         ap->port_no = port_no;
         ap->hard_port_no = port_no;
-        if (ent->legacy_mode)
-                ap->hard_port_no += ent->hard_port_no;
         ap->pio_mask = ent->pio_mask;
         ap->mwdma_mask = ent->mwdma_mask;
         ap->udma_mask = ent->udma_mask;