1 files changed, 38 insertions, 13 deletions

diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index 24a011b25024..0d87eec84966 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -20,29 +20,30 @@
 #include <linux/ata.h>
 
 #define DRV_NAME        "pata_marvell"
-#define DRV_VERSION     "0.1.4"
+#define DRV_VERSION     "0.1.6"
 
 /**
- *      marvell_pre_reset       -       check for 40/80 pin
- *      @link: link
- *      @deadline: deadline jiffies for the operation
+ *      marvell_pata_active     -       check if PATA is active
+ *      @pdev: PCI device
  *
- *      Perform the PATA port setup we need.
+ *      Returns 1 if the PATA port may be active. We know how to check this
+ *      for the 6145 but not the other devices
  */
 
-static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
+static int marvell_pata_active(struct pci_dev *pdev)
 {
-        struct ata_port *ap = link->ap;
-        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        int i;
         u32 devices;
         void __iomem *barp;
-        int i;
 
-        /* Check if our port is enabled */
+        /* We don't yet know how to do this for other devices */
+        if (pdev->device != 0x6145)
+                return 1;       
 
         barp = pci_iomap(pdev, 5, 0x10);
         if (barp == NULL)
                 return -ENOMEM;
+
         printk("BAR5:");
         for(i = 0; i <= 0x0F; i++)
                 printk("%02X:%02X ", i, ioread8(barp + i));
@@ -51,9 +52,27 @@ static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
         devices = ioread32(barp + 0x0C);
         pci_iounmap(pdev, barp);
 
-        if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
-            (!(devices & 0x10)))        /* PATA enable ? */
-                return -ENOENT;
+        if (devices & 0x10)
+                return 1;
+        return 0;
+}
+
+/**
+ *      marvell_pre_reset       -       check for 40/80 pin
+ *      @link: link
+ *      @deadline: deadline jiffies for the operation
+ *
+ *      Perform the PATA port setup we need.
+ */
+
+static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+        struct ata_port *ap = link->ap;
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+        if (pdev->device == 0x6145 && ap->port_no == 0 &&
+                !marvell_pata_active(pdev))     /* PATA enable ? */
+                        return -ENOENT;
 
         return ata_sff_prereset(link, deadline);
 }
@@ -128,6 +147,12 @@ static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *i
         if (pdev->device == 0x6101)
                 ppi[1] = &ata_dummy_port_info;
 
+#if defined(CONFIG_AHCI) || defined(CONFIG_AHCI_MODULE)
+        if (!marvell_pata_active(pdev)) {
+                printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n");
+                return -ENODEV;
+        }
+#endif
         return ata_pci_sff_init_one(pdev, ppi, &marvell_sht, NULL);
 }