drm: remove the DRM pci domain

This patch removes the pci_domain from the DRM device structure, and
gets it via a macro that either asks the platform or does the alpha special
case. jgarzik asked for this to just use the platform magic, but I've no
alpha experience and I'd rather not just break it and wait for someone to
give out.
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/drmP.h

@@ -699,7 +699,6 @@ typedef struct drm_device {
 	drm_agp_head_t *agp;	/**< AGP data */
 
 	struct pci_dev *pdev;		/**< PCI device structure */
-	int pci_domain;			/**< PCI bus domain number */
 #ifdef __alpha__
 	struct pci_controller *hose;
 #endif
@@ -721,6 +720,12 @@ static __inline__ int drm_core_check_feature(struct drm_device *dev,
 	return ((dev->driver->driver_features & feature) ? 1 : 0);
 }
 
+#ifdef __alpha__
+#define drm_get_pci_domain(dev) dev->hose->bus->number
+#else
+#define drm_get_pci_domain(dev) pci_domain_nr(dev->pdev->bus)
+#endif
+
 #if __OS_HAS_AGP
 static inline int drm_core_has_AGP(struct drm_device *dev)
 {

drivers/char/drm/drm_ioctl.c

@@ -127,7 +127,7 @@ int drm_setunique(struct inode *inode, struct file *filp,
 	domain = bus >> 8;
 	bus &= 0xff;
 
-	if ((domain != dev->pci_domain) ||
+	if ((domain != drm_get_pci_domain(dev)) ||
 	    (bus != dev->pdev->bus->number) ||
 	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
 	    (func != PCI_FUNC(dev->pdev->devfn)))
@@ -149,7 +149,7 @@ static int drm_set_busid(drm_device_t * dev)
 		return ENOMEM;
 
 	len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
-		       dev->pci_domain, dev->pdev->bus->number,
+		       drm_get_pci_domain(dev), dev->pdev->bus->number,
 		       PCI_SLOT(dev->pdev->devfn),
 		       PCI_FUNC(dev->pdev->devfn));
 

drivers/char/drm/drm_irq.c

@@ -64,7 +64,7 @@ int drm_irq_by_busid(struct inode *inode, struct file *filp,
 	if (copy_from_user(&p, argp, sizeof(p)))
 		return -EFAULT;
 
-	if ((p.busnum >> 8) != dev->pci_domain ||
+	if ((p.busnum >> 8) != drm_get_pci_domain(dev) ||
 	    (p.busnum & 0xff) != dev->pdev->bus->number ||
 	    p.devnum != PCI_SLOT(dev->pdev->devfn) || p.funcnum != PCI_FUNC(dev->pdev->devfn))
 		return -EINVAL;

drivers/char/drm/drm_stub.c

@@ -68,9 +68,6 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
 
 #ifdef __alpha__
 	dev->hose = pdev->sysdata;
-	dev->pci_domain = dev->hose->bus->number;
-#else
-	dev->pci_domain = 0;
 #endif
 	dev->irq = pdev->irq;