vga-switcheroo: Use vga_default_device()

vga-switcheroo currently changes the default VGA device by fiddling with
the IORESOURCE_ROM_SHADOW flag on the device. This isn't strictly accurate,
since there's no guarantee that switching also changes the ROM decoding.
Switch over to using the vgaarb functions for this.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 58434e804d91..9d830286f883 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -28,6 +28,8 @@
 #include <linux/pci.h>
 #include <linux/vga_switcheroo.h>
 
+#include <linux/vgaarb.h>
+
 struct vga_switcheroo_client {
         struct pci_dev *pdev;
         struct fb_info *fb_info;
@@ -122,7 +124,7 @@ int vga_switcheroo_register_client(struct pci_dev *pdev,
         vgasr_priv.clients[index].reprobe = reprobe;
         vgasr_priv.clients[index].can_switch = can_switch;
         vgasr_priv.clients[index].id = -1;
-        if (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)
+        if (pdev == vga_default_device())
                 vgasr_priv.clients[index].active = true;
 
         vgasr_priv.registered_clients |= (1 << index);
@@ -230,9 +232,8 @@ static int vga_switchto_stage1(struct vga_switcheroo_client *new_client)
         if (new_client->pwr_state == VGA_SWITCHEROO_OFF)
                 vga_switchon(new_client);
 
-        /* swap shadow resource to denote boot VGA device has changed so X starts on new device */
-        active->pdev->resource[PCI_ROM_RESOURCE].flags &= ~IORESOURCE_ROM_SHADOW;
-        new_client->pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
+        vga_set_default_device(new_client->pdev);
+
         return 0;
 }