From: Yifan Zhang yifan1.zhang@amd.com
[ Upstream commit 6f4b590aae217da16cfa44039a2abcfb209137ab ]
When IOMMU disabled in sbios and kfd in iommuv2 path, IOMMU resume failure blocks system resume. Don't allow kfd to use iommu v2 when iommu is disabled.
Reported-by: youling youling257@gmail.com Tested-by: youling youling257@gmail.com Signed-off-by: Yifan Zhang yifan1.zhang@amd.com Reviewed-by: James Zhu James.Zhu@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdkfd/kfd_device.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index a6afacc3b10cd..88c483f699894 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c @@ -916,6 +916,7 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd, kfd_double_confirm_iommu_support(kfd);
if (kfd_iommu_device_init(kfd)) { + kfd->use_iommu_v2 = false; dev_err(kfd_device, "Error initializing iommuv2\n"); goto device_iommu_error; }