From: Jesse Zhang jesse.zhang@amd.com

[ Upstream commit c8c19ebf7c0b202a6a2d37a52ca112432723db5f ]

Avoid using the negative values for clk_idex as an index into an array pptable->DpmDescriptor.

V2: fix clk_index return check (Tim Huang)

Signed-off-by: Jesse Zhang Jesse.Zhang@amd.com Reviewed-by: Tim Huang Tim.Huang@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com [Minor conflict resolved due to code context change.] Signed-off-by: Jianqi Ren jianqi.ren.cn@windriver.com Signed-off-by: He Zhe zhe.he@windriver.com --- Verified the build test --- .../gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 21 ++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c index dfba0bc73207..9f5dcfaebe63 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c @@ -1231,19 +1231,22 @@ static int navi10_get_current_clk_freq_by_table(struct smu_context *smu, value); }

-static bool navi10_is_support_fine_grained_dpm(struct smu_context *smu, enum smu_clk_type clk_type) +static int navi10_is_support_fine_grained_dpm(struct smu_context *smu, enum smu_clk_type clk_type) { PPTable_t *pptable = smu->smu_table.driver_pptable; DpmDescriptor_t *dpm_desc = NULL; - uint32_t clk_index = 0; + int clk_index = 0;

clk_index = smu_cmn_to_asic_specific_index(smu, CMN2ASIC_MAPPING_CLK, clk_type); + if (clk_index < 0) + return clk_index; + dpm_desc = &pptable->DpmDescriptor[clk_index];

/* 0 - Fine grained DPM, 1 - Discrete DPM */ - return dpm_desc->SnapToDiscrete == 0; + return dpm_desc->SnapToDiscrete == 0 ? 1 : 0; }

static inline bool navi10_od_feature_is_supported(struct smu_11_0_overdrive_table *od_table, enum SMU_11_0_ODFEATURE_CAP cap) @@ -1299,7 +1302,11 @@ static int navi10_print_clk_levels(struct smu_context *smu, if (ret) return size;

- if (!navi10_is_support_fine_grained_dpm(smu, clk_type)) { + ret = navi10_is_support_fine_grained_dpm(smu, clk_type); + if (ret < 0) + return ret; + + if (!ret) { for (i = 0; i < count; i++) { ret = smu_v11_0_get_dpm_freq_by_index(smu, clk_type, i, &value); if (ret) @@ -1468,7 +1475,11 @@ static int navi10_force_clk_levels(struct smu_context *smu, case SMU_UCLK: case SMU_FCLK: /* There is only 2 levels for fine grained DPM */ - if (navi10_is_support_fine_grained_dpm(smu, clk_type)) { + ret = navi10_is_support_fine_grained_dpm(smu, clk_type); + if (ret < 0) + return ret; + + if (ret) { soft_max_level = (soft_max_level >= 1 ? 1 : 0); soft_min_level = (soft_min_level >= 1 ? 1 : 0); }