[PATCH] drm/qxl: don't take vga ports on rev5+

[PATCH] drm/qxl: don't take vga ports on rev5+

[Gerd Hoffmann]

qemu 5.0 introduces a new qxl hardware revision 5.  Unlike revision 4
(and below) the device doesn't switch back into vga compatibility mode
when someone touches the vga ports.  So we don't have to reserve the
vga ports any more to avoid that happening.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_drv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index 4fda3f9b29f4..afea743989dd 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -93,7 +93,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (ret)
 		goto disable_pci;
 
-	if (is_vga(pdev)) {
+	if (is_vga(pdev) && pdev->revision < 5) {
 		ret = vga_get_interruptible(pdev, VGA_RSRC_LEGACY_IO);
 		if (ret) {
 			DRM_ERROR("can't get legacy vga ioports\n");
@@ -124,7 +124,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 unload:
 	qxl_device_fini(qdev);
 put_vga:
-	if (is_vga(pdev))
+	if (is_vga(pdev) && pdev->revision < 5)
 		vga_put(pdev, VGA_RSRC_LEGACY_IO);
 disable_pci:
 	pci_disable_device(pdev);
@@ -155,7 +155,7 @@ qxl_pci_remove(struct pci_dev *pdev)
 
 	drm_dev_unregister(dev);
 	drm_atomic_helper_shutdown(dev);
-	if (is_vga(pdev))
+	if (is_vga(pdev) && pdev->revision < 5)
 		vga_put(pdev, VGA_RSRC_LEGACY_IO);
 	drm_dev_put(dev);
 }
-- 
2.18.2