svn commit: r333230 - head/sys/dev/pci

[Peter Grehan]

Author: grehan
Date: Thu May  3 22:51:44 2018
New Revision: 333230
URL: https://svnweb.freebsd.org/changeset/base/333230

Log:
  Allow PCI VGA devices to be detached.
  
  GPUs often have a VGA PCI class code and are probed/attached
  by the VGA driver. Allow them to be detached so they can
  be presented as passthru devices to VM guests.
  
  Submitted by:	mmacy
  Reviewed by:	jhb, imp, rgrimes
  MFC after:	3 weeks
  Differential Revision:	https://reviews.freebsd.org/D15269

Modified:
  head/sys/dev/pci/vga_pci.c

Modified: head/sys/dev/pci/vga_pci.c
==============================================================================
--- head/sys/dev/pci/vga_pci.c	Thu May  3 21:45:59 2018	(r333229)
+++ head/sys/dev/pci/vga_pci.c	Thu May  3 22:51:44 2018	(r333230)
@@ -283,6 +283,17 @@ vga_pci_suspend(device_t dev)
 }
 
 static int
+vga_pci_detach(device_t dev)
+{
+	int error; 
+
+	error = bus_generic_detach(dev);
+	if (error == 0)
+		error = device_delete_children(dev);
+	return (error);
+}
+
+static int
 vga_pci_resume(device_t dev)
 {
 
@@ -620,6 +631,7 @@ static device_method_t vga_pci_methods[] = {
 	DEVMETHOD(device_attach,	vga_pci_attach),
 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
 	DEVMETHOD(device_suspend,	vga_pci_suspend),
+	DEVMETHOD(device_detach,	vga_pci_detach),
 	DEVMETHOD(device_resume,	vga_pci_resume),
 
 	/* Bus interface */