From: "Lin.Cao" <lincao12@amd.com>
Date: Mon, 8 May 2023 17:28:41 +0800
Subject: [PATCH] drm/amdgpu: Fix vram recover doesn't work after whole GPU
reset (v2)
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References: bsc#1012628
Patch-mainline: 6.3.3
Git-commit: 6c032c37ac3ef3b7df30937c785ecc4da428edc0
commit 6c032c37ac3ef3b7df30937c785ecc4da428edc0 upstream.
v1: Vmbo->shadow is used to back vram bo up when vram lost. So that we
should set shadow as vmbo->shadow to recover vmbo->bo
v2: Modify if(vmbo->shadow) shadow = vmbo->shadow as if(!vmbo->shadow)
continue;
Fixes: e18aaea733da ("drm/amdgpu: move shadow_list to amdgpu_bo_vm")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Lin.Cao <lincao12@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 6f715fb9..aa46726d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4482,7 +4482,11 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
dev_info(adev->dev, "recover vram bo from shadow start\n");
mutex_lock(&adev->shadow_list_lock);
list_for_each_entry(vmbo, &adev->shadow_list, shadow_list) {
- shadow = &vmbo->bo;
+ /* If vm is compute context or adev is APU, shadow will be NULL */
+ if (!vmbo->shadow)
+ continue;
+ shadow = vmbo->shadow;
+
/* No need to recover an evicted BO */
if (shadow->tbo.resource->mem_type != TTM_PL_TT ||
shadow->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET ||
--
2.35.3