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drm/amdgpu: check if we need to reset at init time (v2) 

To deal with situations like kexec or GPU VM passthrough
where the device may have been used previously without a
proper GPU reset between.

v2: rebase

bug: https://bugs.freedesktop.org/show_bug.cgi?id=108585
bug: https://bugs.freedesktop.org/show_bug.cgi?id=108754
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2018-11-01 00:02:01 -05:00
parent 9281f12cab
commit 95e8e59ec4
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -2550,6 +2550,17 @@ int amdgpu_device_init(struct amdgpu_device *adev,
/* detect if we are with an SRIOV vbios */
amdgpu_device_detect_sriov_bios(adev);
/* check if we need to reset the asic
* E.g., driver was not cleanly unloaded previously, etc.
*/
if (amdgpu_asic_need_reset_on_init(adev)) {
r = amdgpu_asic_reset(adev);
if (r) {
dev_err(adev->dev, "asic reset on init failed\n");
goto failed;
}
}
/* Post card if necessary */
if (amdgpu_device_need_post(adev)) {
if (!adev->bios) {