From 4d2ccd96ac25846749fc58691f5142a966e65b3a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Wed, 16 Nov 2022 15:45:36 +0100
Subject: [PATCH] drm/amdgpu: WARN when freeing kernel memory during suspend
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When buffers are freed during suspend there is no guarantee that
they can be re-allocated during resume.
The PSP subsystem seems to be quite buggy regarding this, so add
a WARN_ON() to point out those bugs.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexdeucher@amd.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 2df55cc7e07f6..3393c1a6a0ff1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -422,6 +422,8 @@ void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
if (*bo == NULL)
return;
+ WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend);
+
if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
if (cpu_addr)
amdgpu_bo_kunmap(*bo);
--
2.30.2