ide: add ide_deprecated_find_port() helper

* Factor out code for finding ide_hwifs[] slot from ide_register_hw()
  to ide_deprecated_find_port().

* Convert bast-ide, ide-cs and delkin_cb host drivers to use ide_device_add()
  instead of ide_register_hw() (while at it drop doing "ide_unregister()" loop
  which tries to unregister _all_ IDE interfaces if useable ide_hwifs[] slot
  cannot be find).

This patch leaves us with only two ide_register_hw() users:
- drivers/macintosh/mediabay.c
- drivers/ide/ide.c

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

4 files changed, 99 insertions, 20 deletions

diff --git a/drivers/ide/arm/bast-ide.c b/drivers/ide/arm/bast-ide.c
index 037300fa284c..2864f5aca3f1 100644
--- a/drivers/ide/arm/bast-ide.c
+++ b/drivers/ide/arm/bast-ide.c
@@ -28,8 +28,10 @@ static int __init
 bastide_register(unsigned int base, unsigned int aux, int irq,
                  ide_hwif_t **hwif)
 {
+        ide_hwif_t *hwif;
         hw_regs_t hw;
         int i;
+        u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
         memset(&hw, 0, sizeof(hw));
 
@@ -44,8 +46,24 @@ bastide_register(unsigned int base, unsigned int aux, int irq,
         hw.io_ports[IDE_CONTROL_OFFSET] = aux + (6 * 0x20);
         hw.irq = irq;
 
-        ide_register_hw(&hw, NULL, hwif);
+        hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+        if (hwif == NULL)
+                goto out;
 
+        i = hwif->index;
+
+        if (hwif->present)
+                ide_unregister(i, 0, 1);
+        else if (!hwif->hold)
+                ide_init_port_data(hwif, i);
+
+        ide_init_port_hw(hwif, &hw);
+        hwif->quirkproc = NULL;
+
+        idx[0] = i;
+
+        ide_device_add(idx, NULL);
+out:
         return 0;
 }
 
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 166acd513d5b..d42216b52a7b 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -683,6 +683,31 @@ void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 }
 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 
+ide_hwif_t *ide_deprecated_find_port(unsigned long base)
+{
+        ide_hwif_t *hwif;
+        int i;
+
+        for (i = 0; i < MAX_HWIFS; i++) {
+                hwif = &ide_hwifs[i];
+                if (hwif->io_ports[IDE_DATA_OFFSET] == base)
+                        goto found;
+        }
+
+        for (i = 0; i < MAX_HWIFS; i++) {
+                hwif = &ide_hwifs[i];
+                if (hwif->hold)
+                        continue;
+                if (!hwif->present && hwif->mate == NULL)
+                        goto found;
+        }
+
+        hwif = NULL;
+found:
+        return hwif;
+}
+EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
+
 /**
  *      ide_register_hw         -       register IDE interface
  *      @hw: hardware registers
@@ -702,18 +727,10 @@ int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
         do {
-                for (index = 0; index < MAX_HWIFS; ++index) {
-                        hwif = &ide_hwifs[index];
-                        if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
-                                goto found;
-                }
-                for (index = 0; index < MAX_HWIFS; ++index) {
-                        hwif = &ide_hwifs[index];
-                        if (hwif->hold)
-                                continue;
-                        if (!hwif->present && hwif->mate == NULL)
-                                goto found;
-                }
+                hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
+                index = hwif->index;
+                if (hwif)
+                        goto found;
                 for (index = 0; index < MAX_HWIFS; index++)
                         ide_unregister(index, 1, 1);
         } while (retry--);
diff --git a/drivers/ide/legacy/ide-cs.c b/drivers/ide/legacy/ide-cs.c
index 2d772e2bebb3..38e87ad211e0 100644
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -145,13 +145,36 @@ static void ide_detach(struct pcmcia_device *link)
 
 static int idecs_register(unsigned long io, unsigned long ctl, unsigned long irq, struct pcmcia_device *handle)
 {
+    ide_hwif_t *hwif;
     hw_regs_t hw;
+    int i;
+    u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+
     memset(&hw, 0, sizeof(hw));
     ide_init_hwif_ports(&hw, io, ctl, NULL);
     hw.irq = irq;
     hw.chipset = ide_pci;
     hw.dev = &handle->dev;
-    return ide_register_hw(&hw, &ide_undecoded_slave, NULL);
+
+    hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+    if (hwif == NULL)
+        return -1;
+
+    i = hwif->index;
+
+    if (hwif->present)
+        ide_unregister(i, 0, 1);
+    else if (!hwif->hold)
+        ide_init_port_data(hwif, i);
+
+    ide_init_port_hw(hwif, &hw);
+    hwif->quirkproc = &ide_undecoded_slave;
+
+    idx[0] = i;
+
+    ide_device_add(idx, NULL);
+
+    return hwif->present ? i : -1;
 }
 
 /*======================================================================
diff --git a/drivers/ide/pci/delkin_cb.c b/drivers/ide/pci/delkin_cb.c
index 4e9ebaa79624..15670801a67f 100644
--- a/drivers/ide/pci/delkin_cb.c
+++ b/drivers/ide/pci/delkin_cb.c
@@ -51,6 +51,7 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
         ide_hwif_t *hwif = NULL;
         ide_drive_t *drive;
         int i, rc;
+        u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
         rc = pci_enable_device(dev);
         if (rc) {
@@ -77,12 +78,27 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
         hw.irq = dev->irq;
         hw.chipset = ide_pci;           /* this enables IRQ sharing */
 
-        rc = ide_register_hw(&hw, &ide_undecoded_slave, &hwif);
-        if (rc < 0) {
-                printk(KERN_ERR "delkin_cb: ide_register_hw failed (%d)\n", rc);
-                pci_disable_device(dev);
-                return -ENODEV;
-        }
+        hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+        if (hwif == NULL)
+                goto out_disable;
+
+        i = hwif->index;
+
+        if (hwif->present)
+                ide_unregister(i, 0, 1);
+        else if (!hwif->hold)
+                ide_init_port_data(hwif, i);
+
+        ide_init_port_hw(hwif, &hw);
+        hwif->quirkproc = &ide_undecoded_slave;
+
+        idx[0] = i;
+
+        ide_device_add(idx, NULL);
+
+        if (!hwif->present)
+                goto out_disable;
+
         pci_set_drvdata(dev, hwif);
         hwif->dev = &dev->dev;
         drive = &hwif->drives[0];
@@ -91,6 +107,11 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
                 drive->unmask   = 1;
         }
         return 0;
+
+out_disable:
+        printk(KERN_ERR "delkin_cb: no IDE devices found\n");
+        pci_disable_device(dev);
+        return -ENODEV;
 }
 
 static void