drm/amdgpu: skip BOs being torn down during GTT recovery

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A GPU reset can race with BO teardown after the BO's GTT resource has
been marked for deletion but before its drm_mm node is removed. In this
window, amdgpu_gtt_mgr_recover() can treat the node as a live BO and try
to restore its GART mapping while its TT backing is being destroyed.

Recolor the GTT node from amdgpu_bo_delete_mem_notify() so that recovery
skips it, reusing the existing color for ranges without a BO. The range
stays allocated until the resource is freed.

This prevents reset recovery from accessing a BO whose backing storage
is no longer valid.

v2: refine commit message. (David Francis)
v3: Remove new BO color. (Christian)

Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Yifan Zhang 2026-07-23 13:11:14 +08:00 • committed by Alex Deucher

parent a4b0720e4f

commit 24775b2e8b

3 changed files with 27 additions and 0 deletions

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23

drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c

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3

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

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1

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h

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