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drm/amdgpu: Disallow partition query during reset

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Reject queries to get current partition modes during reset. Also, don't
accept sysfs interface requests to switch compute partition mode while
in reset.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2025-04-16 12:23:44 +05:30
committed by Alex Deucher
parent af0819755c
commit 75f138db48
2 changed files with 14 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
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@@ -1230,6 +1230,10 @@ static ssize_t current_memory_partition_show(
struct amdgpu_device *adev = drm_to_adev(ddev);
enum amdgpu_memory_partition mode;
/* Only minimal precaution taken to reject requests while in reset */
if (amdgpu_in_reset(adev))
return -EPERM;
mode = adev->gmc.gmc_funcs->query_mem_partition_mode(adev);
if ((mode >= ARRAY_SIZE(nps_desc)) ||
(BIT(mode) & AMDGPU_ALL_NPS_MASK) != BIT(mode))