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| author | Asad Kamal <asad.kamal@amd.com> | 2026-06-03 15:11:33 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-06-04 15:25:58 -0400 |
| commit | d2be142124f40be1e5b6c7d25e9f9069bc874c1f (patch) | |
| tree | ccb77bda94a8f329e95afb593b5459aabb1b3d1d | |
| parent | 01112e241e37f9ac98b6f418d93ce2e0b87b7ee0 (diff) | |
| download | linux-d2be142124f40be1e5b6c7d25e9f9069bc874c1f.tar.gz linux-d2be142124f40be1e5b6c7d25e9f9069bc874c1f.zip | |
drm/amd/pm: Stop pp_od_clk_voltage emit at PAGE_SIZE
Stop appending OD sections in amdgpu_get_pp_od_clk_voltage()
once the sysfs page is full, instead of checking every sysfs_emit_at()
in SMU helpers. This is purely defensive hardening.
v2: Drop the prior series that checked sysfs_emit_at()
return values in every SMU *_emit_clk_levels() helper and
smu_cmn_print_*().(Kevin)
v3: Update description, remove all clamping
Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index 52e5cbcac352..714c702b4f8c 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -874,6 +874,8 @@ static ssize_t amdgpu_get_pp_od_clk_voltage(struct device *dev, for (clk_index = 0 ; clk_index < ARRAY_SIZE(od_clocks) ; clk_index++) { amdgpu_dpm_emit_clock_levels(adev, od_clocks[clk_index], buf, &size); + if (unlikely(size >= (PAGE_SIZE - 1))) + break; } if (size == 0) |