arkfb: Compute VGA base iomem pointer explicitly.

This allows the driver to work in multi-domain PCI
configurations.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c
index 1c69db310ed5..8686429cbdf0 100644
--- a/drivers/video/arkfb.c
+++ b/drivers/video/arkfb.c
@@ -951,6 +951,8 @@ static struct fb_ops arkfb_ops = {
 /* PCI probe */
 static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
+        struct pci_bus_region bus_reg;
+        struct resource vga_res;
         struct fb_info *info;
         struct arkfb_info *par;
         int rc;
@@ -1006,6 +1008,15 @@ static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_
                 goto err_iomap;
         }
 
+        bus_reg.start = 0;
+        bus_reg.end = 64 * 1024;
+
+        vga_res.flags = IORESOURCE_IO;
+
+        pcibios_bus_to_resource(dev, &vga_res, &bus_reg);
+
+        par->state.vgabase = (void __iomem *) vga_res.start;
+
         /* FIXME get memsize */
         regval = vga_rseq(par->state.vgabase, 0x10);
         info->screen_size = (1 << (regval >> 6)) << 20;