drm/amd/pm: Add missing mutex for pp_get_power_profile_mode

Prevent possible issues from set and get being called simultaneously.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
index 3212150..9780076 100644 (file)
--- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
@@ -875,6 +875,7 @@ pp_dpm_get_vce_clock_state(void *handle, unsigned idx)
 static int pp_get_power_profile_mode(void *handle, char *buf)
 {
        struct pp_hwmgr *hwmgr = handle;
+       int ret;
 
        if (!hwmgr || !hwmgr->pm_en || !buf)
                return -EINVAL;
@@ -884,7 +885,10 @@ static int pp_get_power_profile_mode(void *handle, char *buf)
                return snprintf(buf, PAGE_SIZE, "\n");
        }
 
-       return hwmgr->hwmgr_func->get_power_profile_mode(hwmgr, buf);
+       mutex_lock(&hwmgr->smu_lock);
+       ret = hwmgr->hwmgr_func->get_power_profile_mode(hwmgr, buf);
+       mutex_unlock(&hwmgr->smu_lock);
+       return ret;
 }
 
 static int pp_set_power_profile_mode(void *handle, long *input, uint32_t size)