linux-kernel - [PATCH 5.15 05/12] drm/amdkfd: fix boot failure when iommu is disabled in Picasso.

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Message-Id: <20211104141159.729493351@linuxfoundation.org>
Date:   Thu,  4 Nov 2021 15:12:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, youling <youling257@...il.com>,
        Yifan Zhang <yifan1.zhang@....com>,
        James Zhu <James.Zhu@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.15 05/12] drm/amdkfd: fix boot failure when iommu is disabled in Picasso.

From: Yifan Zhang <yifan1.zhang@....com>

commit afd18180c07026f94a80ff024acef5f4159084a4 upstream.

When IOMMU disabled in sbios and kfd in iommuv2 path, iommuv2
init will fail. But this failure should not block amdgpu driver init.

Reported-by: youling <youling257@...il.com>
Tested-by: youling <youling257@...il.com>
Signed-off-by: Yifan Zhang <yifan1.zhang@....com>
Reviewed-by: James Zhu <James.Zhu@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |    4 ----
 drivers/gpu/drm/amd/amdkfd/kfd_device.c    |    3 +++
 2 files changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2432,10 +2432,6 @@ static int amdgpu_device_ip_init(struct
 	if (!adev->gmc.xgmi.pending_reset)
 		amdgpu_amdkfd_device_init(adev);
 
-	r = amdgpu_amdkfd_resume_iommu(adev);
-	if (r)
-		goto init_failed;
-
 	amdgpu_fru_get_product_info(adev);
 
 init_failed:
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -924,6 +924,9 @@ bool kgd2kfd_device_init(struct kfd_dev
 
 	svm_migrate_init((struct amdgpu_device *)kfd->kgd);
 
+	if(kgd2kfd_resume_iommu(kfd))
+		goto device_iommu_error;
+
 	if (kfd_resume(kfd))
 		goto kfd_resume_error;