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drm/amd/pm: Fix the null pointer dereference for vega10_hwmgr

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[ Upstream commit 50151b7f1c ]

Check return value and conduct null pointer handling to avoid null pointer dereference.

Signed-off-by: Bob Zhou <bob.zhou@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bob Zhou 2024-05-31 15:01:22 +08:00 committed by Greg Kroah-Hartman
parent 1adb5ebe20
commit 2e53894499
1 changed files with 25 additions and 4 deletions
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29
drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
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@ -3418,13 +3418,17 @@ static int vega10_find_dpm_states_clocks_in_dpm_table(struct pp_hwmgr *hwmgr, co
const struct vega10_power_state *vega10_ps =
cast_const_phw_vega10_power_state(states->pnew_state);
struct vega10_single_dpm_table *sclk_table = &(data->dpm_table.gfx_table);
uint32_t sclk = vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].gfx_clock;
struct vega10_single_dpm_table *mclk_table = &(data->dpm_table.mem_table);
uint32_t mclk = vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].mem_clock;
uint32_t sclk, mclk;
uint32_t i;
if (vega10_ps == NULL)
return -EINVAL;
sclk = vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].gfx_clock;
mclk = vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].mem_clock;
for (i = 0; i < sclk_table->count; i++) {
if (sclk == sclk_table->dpm_levels[i].value)
break;
@ -3731,6 +3735,9 @@ static int vega10_generate_dpm_level_enable_mask(
cast_const_phw_vega10_power_state(states->pnew_state);
int i;
if (vega10_ps == NULL)
return -EINVAL;
PP_ASSERT_WITH_CODE(!vega10_trim_dpm_states(hwmgr, vega10_ps),
"Attempt to Trim DPM States Failed!",
return -1);
@ -4998,6 +5005,8 @@ static int vega10_check_states_equal(struct pp_hwmgr *hwmgr,
vega10_psa = cast_const_phw_vega10_power_state(pstate1);
vega10_psb = cast_const_phw_vega10_power_state(pstate2);
if (vega10_psa == NULL || vega10_psb == NULL)
return -EINVAL;
/* If the two states don't even have the same number of performance levels
* they cannot be the same state.
@ -5131,6 +5140,8 @@ static int vega10_set_sclk_od(struct pp_hwmgr *hwmgr, uint32_t value)
return -EINVAL;
vega10_ps = cast_phw_vega10_power_state(&ps->hardware);
if (vega10_ps == NULL)
return -EINVAL;
vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].gfx_clock =
@ -5182,6 +5193,8 @@ static int vega10_set_mclk_od(struct pp_hwmgr *hwmgr, uint32_t value)
return -EINVAL;
vega10_ps = cast_phw_vega10_power_state(&ps->hardware);
if (vega10_ps == NULL)
return -EINVAL;
vega10_ps->performance_levels
[vega10_ps->performance_level_count - 1].mem_clock =
@ -5423,6 +5436,9 @@ static void vega10_odn_update_power_state(struct pp_hwmgr *hwmgr)
return;
vega10_ps = cast_phw_vega10_power_state(&ps->hardware);
if (vega10_ps == NULL)
return;
max_level = vega10_ps->performance_level_count - 1;
if (vega10_ps->performance_levels[max_level].gfx_clock !=
@ -5445,6 +5461,9 @@ static void vega10_odn_update_power_state(struct pp_hwmgr *hwmgr)
ps = (struct pp_power_state *)((unsigned long)(hwmgr->ps) + hwmgr->ps_size * (hwmgr->num_ps - 1));
vega10_ps = cast_phw_vega10_power_state(&ps->hardware);
if (vega10_ps == NULL)
return;
max_level = vega10_ps->performance_level_count - 1;
if (vega10_ps->performance_levels[max_level].gfx_clock !=
@ -5635,6 +5654,8 @@ static int vega10_get_performance_level(struct pp_hwmgr *hwmgr, const struct pp_
return -EINVAL;
vega10_ps = cast_const_phw_vega10_power_state(state);
if (vega10_ps == NULL)
return -EINVAL;
i = index > vega10_ps->performance_level_count - 1 ?
vega10_ps->performance_level_count - 1 : index;