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Commit f6252114 authored by Dave Airlie's avatar Dave Airlie
Browse files

vgaarb: a NULL bridge is acceptable for root devices. 



I assumed all PCI buses had a bridge, but playing with qemu recently, I
discovered vgaarb bug where it wasn't detecting both devices shared a bridge
at the root level.

Don't check for NULL, if two buses have a NULL bridge, assume they share the
root bus.

Acked-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent d53dab3a

drivers/gpu/vga/vgaarb.c

+21 −23
Original line number Diff line number Diff line
@@ -465,7 +465,6 @@ static void vga_arbiter_check_bridge_sharing(struct vga_device *vgadev) 
	while (new_bus) {

		new_bridge = new_bus->self;



		if (new_bridge) {

		/* go through list of devices already registered */

		list_for_each_entry(same_bridge_vgadev, &vga_list, list) {

			bus = same_bridge_vgadev->pdev->bus;
@@ -491,7 +490,6 @@ static void vga_arbiter_check_bridge_sharing(struct vga_device *vgadev) 
				bus = bus->parent;

			}

		}

		}

		new_bus = new_bus->parent;

	}

}