From 63408972e4715ee03e470d9616e2b6aebd6f2595 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Thu, 12 Dec 2019 18:16:57 +0000 Subject: drm/amd/powerplay: fix various dereferences of a pointer before it is null checked There are several occurrances of the pointer hwmgr being dereferenced before it is null checked. Fix these by performing the dereference of hwmgr after it has been null checked. Addresses-Coverity: ("Dereference before null check") Fixes: c9ffa427db34e6 ("drm/amd/powerplay: enable pp one vf mode for vega10") Signed-off-by: Colin Ian King Signed-off-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 6 +++--- drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 15 +++------------ 2 files changed, 6 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c index 5087d6bdba60..322c2015d3a0 100644 --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c @@ -275,12 +275,12 @@ static int pp_dpm_load_fw(void *handle) { struct pp_hwmgr *hwmgr = handle; - if (!hwmgr->not_vf) - return 0; - if (!hwmgr || !hwmgr->smumgr_funcs || !hwmgr->smumgr_funcs->start_smu) return -EINVAL; + if (!hwmgr->not_vf) + return 0; + if (hwmgr->smumgr_funcs->start_smu(hwmgr)) { pr_err("fw load failed\n"); return -EINVAL; diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c index e2b82c902948..f48fdc7f0382 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c @@ -282,10 +282,7 @@ err: int hwmgr_hw_fini(struct pp_hwmgr *hwmgr) { - if (!hwmgr->not_vf) - return 0; - - if (!hwmgr || !hwmgr->pm_en) + if (!hwmgr || !hwmgr->pm_en || !hwmgr->not_vf) return 0; phm_stop_thermal_controller(hwmgr); @@ -305,10 +302,7 @@ int hwmgr_suspend(struct pp_hwmgr *hwmgr) { int ret = 0; - if (!hwmgr->not_vf) - return 0; - - if (!hwmgr || !hwmgr->pm_en) + if (!hwmgr || !hwmgr->pm_en || !hwmgr->not_vf) return 0; phm_disable_smc_firmware_ctf(hwmgr); @@ -327,13 +321,10 @@ int hwmgr_resume(struct pp_hwmgr *hwmgr) { int ret = 0; - if (!hwmgr->not_vf) - return 0; - if (!hwmgr) return -EINVAL; - if (!hwmgr->pm_en) + if (!hwmgr->not_vf || !hwmgr->pm_en) return 0; ret = phm_setup_asic(hwmgr); -- cgit v1.2.3