ide-pnp: manage I/O resources in driver

* Tell IDE layer to not manage resources by setting hwif->mmio flag.

* Use {request,release}_region() for resources management.

* Use driver name for resources management.

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

1 files changed, 27 insertions, 2 deletions

diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index 8a178a55a027..a0b7d170ecdb 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -18,6 +18,8 @@
 #include <linux/pnp.h>
 #include <linux/ide.h>
 
+#define DRV_NAME "ide-pnp"
+
 /* Add your devices here :)) */
 static struct pnp_device_id idepnp_devices[] = {
         /* Generic ESDI/IDE/ATA compatible hard disk controller */
@@ -29,13 +31,29 @@ static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
 {
         hw_regs_t hw;
         ide_hwif_t *hwif;
+        unsigned long base, ctl;
 
         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
                 return -1;
 
+        base = pnp_port_start(dev, 0);
+        ctl = pnp_port_start(dev, 1);
+
+        if (!request_region(base, 8, DRV_NAME)) {
+                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+                                DRV_NAME, base, base + 7);
+                return -EBUSY;
+        }
+
+        if (!request_region(ctl, 1, DRV_NAME)) {
+                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+                                DRV_NAME, ctl);
+                release_region(base, 8);
+                return -EBUSY;
+        }
+
         memset(&hw, 0, sizeof(hw));
-        ide_std_init_ports(&hw, pnp_port_start(dev, 0),
-                                pnp_port_start(dev, 1));
+        ide_std_init_ports(&hw, base, ctl);
         hw.irq = pnp_irq(dev, 0);
 
         hwif = ide_find_port();
@@ -45,6 +63,7 @@ static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
 
                 ide_init_port_data(hwif, index);
                 ide_init_port_hw(hwif, &hw);
+                hwif->mmio = 1;
 
                 printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
                 pnp_set_drvdata(dev, hwif);
@@ -54,6 +73,9 @@ static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
                 return 0;
         }
 
+        release_region(ctl, 1);
+        release_region(base, 8);
+
         return -1;
 }
 
@@ -65,6 +87,9 @@ static void idepnp_remove(struct pnp_dev *dev)
                 ide_unregister(hwif->index);
         else
                 printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
+
+        release_region(pnp_port_start(dev, 1), 1);
+        release_region(pnp_port_start(dev, 0), 8);
 }
 
 static struct pnp_driver idepnp_driver = {