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drm/radeon/kms: make sure rio_mem is valid before unmapping it 

If we were not able to map the io bar in device init, don't attempt
to unmap it in device fini.  All radeons should have a io bar, so
I doubt this would ever trigger, but just to be on the safe side...

Pointed out by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2010-07-08 12:24:52 -04:00 committed by Dave Airlie
parent ab9e1f5966
commit e0a2ca7375
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/radeon/radeon_device.c
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@ -737,7 +737,8 @@ void radeon_device_fini(struct radeon_device *rdev)
destroy_workqueue(rdev->wq); destroy_workqueue(rdev->wq);
vga_switcheroo_unregister_client(rdev->pdev); vga_switcheroo_unregister_client(rdev->pdev);
vga_client_register(rdev->pdev, NULL, NULL, NULL); vga_client_register(rdev->pdev, NULL, NULL, NULL);
pci_iounmap(rdev->pdev, rdev->rio_mem); if (rdev->rio_mem)
pci_iounmap(rdev->pdev, rdev->rio_mem);
rdev->rio_mem = NULL; rdev->rio_mem = NULL;
iounmap(rdev->rmmio); iounmap(rdev->rmmio);
rdev->rmmio = NULL; rdev->rmmio = NULL;