x86: Use vga_default_device() when determining whether an fb is primary

IORESOURCE_ROM_SHADOW is not necessarily an indication that the hardware
is the primary device. Add support for using the vgaarb functions and
fall back if nothing's set them.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: mingo@redhat.com
Acked-by: hpa@zytor.com
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/arch/x86/video/fbdev.c b/arch/x86/video/fbdev.c
index c5ffb6ac870773d53e15857dc50749ab661ffc1d..d5644bbe8cbac5de5432005d1d694ffc36112563 100644 (file)
--- a/arch/x86/video/fbdev.c
+++ b/arch/x86/video/fbdev.c
@@ -9,24 +9,34 @@
 #include <linux/fb.h>
 #include <linux/pci.h>
 #include <linux/module.h>
+#include <linux/vgaarb.h>
 
 int fb_is_primary_device(struct fb_info *info)
 {
        struct device *device = info->device;
        struct pci_dev *pci_dev = NULL;
+       struct pci_dev *default_device = vga_default_device();
        struct resource *res = NULL;
-       int retval = 0;
 
        if (device)
                pci_dev = to_pci_dev(device);
 
-       if (pci_dev)
-               res = &pci_dev->resource[PCI_ROM_RESOURCE];
+       if (!pci_dev)
+               return 0;
+
+       if (default_device) {
+               if (pci_dev == default_device)
+                       return 1;
+               else
+                       return 0;
+       }
+
+       res = &pci_dev->resource[PCI_ROM_RESOURCE];
 
        if (res && res->flags & IORESOURCE_ROM_SHADOW)
-               retval = 1;
+               return 1;
 
-       return retval;
+       return 0;
 }
 EXPORT_SYMBOL(fb_is_primary_device);
 MODULE_LICENSE("GPL");