drm/amdgpu: Add smu lock around in pp_smu_i2c_bus_access (1963b7c3) · Commits · 戴 / test

Protect from concurrent SMU accesses. Signed-off-by:

Tao Zhou <tao.zhou1@amd.com> Reviewed-and-tested-by:

drivers/gpu/drm/amd/powerplay/amd_powerplay.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -1531,6 +1531,7 @@ static int pp_asic_reset_mode_2(void *handle)
		static int pp_smu_i2c_bus_access(void *handle, bool acquire)
		{
		struct pp_hwmgr *hwmgr = handle;
		int ret = 0;

		if (!hwmgr \|\| !hwmgr->pm_en)
		return -EINVAL;
		@@ -1540,7 +1541,11 @@ static int pp_smu_i2c_bus_access(void *handle, bool acquire)
		return -EINVAL;
		}

		return hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire);
		mutex_lock(&hwmgr->smu_lock);
		ret = hwmgr->hwmgr_func->smu_i2c_bus_access(hwmgr, acquire);
		mutex_unlock(&hwmgr->smu_lock);

		return ret;
		}

		static const struct amd_pm_funcs pp_dpm_funcs = {