drm/radeon: fix asic initialization for virtualized environments
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 13 Jun 2016 19:37:34 +0000 (15:37 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Mon, 13 Jun 2016 19:37:34 +0000 (15:37 -0400)
commit05082b8bbd1a0ffc74235449c4b8930a8c240f85
treea0ba88b8c93b11bc1fcf697599bba62eaf7a8de8
parent048765ad5af7c8939603b4c6cb96293ffa05e00d
drm/radeon: fix asic initialization for virtualized environments

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>
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/radeon_device.c