drm/radeon: fix asic initialization for virtualized environments

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commit 05082b8bbd upstream.

When executing in a PCI passthrough based virtuzliation environment, the
hypervisor will usually attempt to send a PCIe bus reset signal to the
ASIC when the VM reboots. In this scenario, the card is not correctly
initialized, but we still consider it to be posted. Therefore, in a
passthrough based environemnt we should always post the card to guarantee
it is in a good state for driver initialization.

Ported from amdgpu commit:
amdgpu: fix asic initialization for virtualized environments

Cc: Andres Rodriguez <andres.rodriguez@amd.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Alex Deucher 2016-06-13 15:37:34 -04:00 • committed by Greg Kroah-Hartman

parent 13226e1ed8

commit bc326bfa70

1 changed files with 21 additions and 0 deletions

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drivers/gpu/drm/radeon/radeon_device.c

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