[PATCH] radeonfb: Only request resources we need

This patch changes radeon to request only resources 0 and 2 instead of all
3.  This works around problems with some setups where BAR 1 (IO BAR) has
not been assigned by the firmware since it's not used on the machine and
the kernel fails to assign something to it due to the card being between a
P2P bridge that was configured without an IO range at all.

This typically fixes radeonfb on some Apple Xserve G5 machines

Signed-off-by: Daniel Burcaw <dburcaw@terrasoftsolutions.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 20 insertions, 9 deletions

diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c
index e7e8b52014c3..8a7c04c35a75 100644
--- a/drivers/video/aty/radeon_base.c
+++ b/drivers/video/aty/radeon_base.c
@@ -2312,19 +2312,27 @@ static int radeonfb_pci_register (struct pci_dev *pdev,
         rinfo->mmio_base_phys = pci_resource_start (pdev, 2);
 
         /* request the mem regions */
-        ret = pci_request_regions(pdev, "radeonfb");
+        ret = pci_request_region(pdev, 0, "radeonfb framebuffer");
         if (ret < 0) {
-                printk( KERN_ERR "radeonfb (%s): cannot reserve PCI regions."
-                        "  Someone already got them?\n", pci_name(rinfo->pdev));
+                printk( KERN_ERR "radeonfb (%s): cannot request region 0.\n",
+                        pci_name(rinfo->pdev));
                 goto err_release_fb;
         }
 
+        ret = pci_request_region(pdev, 2, "radeonfb mmio");
+        if (ret < 0) {
+                printk( KERN_ERR "radeonfb (%s): cannot request region 2.\n",
+                        pci_name(rinfo->pdev));
+                goto err_release_pci0;
+        }
+
         /* map the regions */
         rinfo->mmio_base = ioremap(rinfo->mmio_base_phys, RADEON_REGSIZE);
         if (!rinfo->mmio_base) {
-                printk(KERN_ERR "radeonfb (%s): cannot map MMIO\n", pci_name(rinfo->pdev));
+                printk(KERN_ERR "radeonfb (%s): cannot map MMIO\n",
+                       pci_name(rinfo->pdev));
                 ret = -EIO;
-                goto err_release_pci;
+                goto err_release_pci2;
         }
 
         rinfo->fb_local_base = INREG(MC_FB_LOCATION) << 16;
@@ -2499,10 +2507,12 @@ err_unmap_rom:
         if (rinfo->bios_seg)
                 radeon_unmap_ROM(rinfo, pdev);
         iounmap(rinfo->mmio_base);
-err_release_pci:
-        pci_release_regions(pdev);
+err_release_pci2:
+        pci_release_region(pdev, 2);
+err_release_pci0:
+        pci_release_region(pdev, 0);
 err_release_fb:
-        framebuffer_release(info);
+        framebuffer_release(info);
 err_disable:
         pci_disable_device(pdev);
 err_out:
@@ -2548,7 +2558,8 @@ static void __devexit radeonfb_pci_unregister (struct pci_dev *pdev)
         iounmap(rinfo->mmio_base);
         iounmap(rinfo->fb_base);
  
-        pci_release_regions(pdev);
+        pci_release_region(pdev, 2);
+        pci_release_region(pdev, 0);
 
         kfree(rinfo->mon1_EDID);
         kfree(rinfo->mon2_EDID);