3 files changed, 23 insertions, 5 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1c9315401f7a..bb66a12c84e5 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5269,11 +5269,19 @@ void ata_port_init(struct ata_port *ap, struct ata_host *host,
         ap->host = host;
         ap->dev = ent->dev;
         ap->port_no = port_no;
-        ap->pio_mask = ent->pio_mask;
-        ap->mwdma_mask = ent->mwdma_mask;
-        ap->udma_mask = ent->udma_mask;
-        ap->flags |= ent->port_flags;
-        ap->ops = ent->port_ops;
+        if (port_no == 1 && ent->pinfo2) {
+                ap->pio_mask = ent->pinfo2->pio_mask;
+                ap->mwdma_mask = ent->pinfo2->mwdma_mask;
+                ap->udma_mask = ent->pinfo2->udma_mask;
+                ap->flags |= ent->pinfo2->flags;
+                ap->ops = ent->pinfo2->port_ops;
+        } else {
+                ap->pio_mask = ent->pio_mask;
+                ap->mwdma_mask = ent->mwdma_mask;
+                ap->udma_mask = ent->udma_mask;
+                ap->flags |= ent->port_flags;
+                ap->ops = ent->port_ops;
+        }
         ap->hw_sata_spd_limit = UINT_MAX;
         ap->active_tag = ATA_TAG_POISON;
         ap->last_ctl = 0xFF;
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index d51dc41fa195..688bb55e197a 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -858,6 +858,7 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int
                         probe_ent->port[p].bmdma_addr = bmdma;
                 }
                 ata_std_ports(&probe_ent->port[p]);
+                probe_ent->pinfo2 = port[1];
                 p++;
         }
 
@@ -907,6 +908,7 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
                                 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
                 }
                 ata_std_ports(&probe_ent->port[1]);
+                probe_ent->pinfo2 = port[1];
         } else
                 probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8715305f611f..ff67e7524fe9 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -361,6 +361,14 @@ struct ata_probe_ent {
         unsigned long           _host_flags;
         void __iomem            *mmio_base;
         void                    *private_data;
+
+        /* port_info for the secondary port.  Together with irq2, it's
+         * used to implement non-uniform secondary port.  Currently,
+         * the only user is ata_piix combined mode.  This workaround
+         * will be removed together with ata_probe_ent when init model
+         * is updated.
+         */
+        const struct ata_port_info *pinfo2;
 };
 
 struct ata_host {