From f20024d8ba6bc8abf8d0ec12eabfdedd9935fff2 Mon Sep 17 00:00:00 2001 From: Andrew Shadura Date: Thu, 3 Nov 2016 11:09:24 +0100 Subject: [PATCH] drm/amd/powerplay: return false instead of -EINVAL Returning -EINVAL from a bool-returning function phm_check_smc_update_required_for_display_configuration has an unexpected effect of returning true, which is probably not what was intended. Replace -EINVAL by false. The only place this function is called from is psm_adjust_power_state_dynamic in drivers/gpu/drm/amd/powerplay/eventmgr/psm.c:106: if (!equal || phm_check_smc_update_required_for_display_configuration(hwmgr)) { phm_apply_state_adjust_rules(hwmgr, requested, pcurrent); phm_set_power_state(hwmgr, &pcurrent->hardware, &requested->hardware); hwmgr->current_ps = requested; } It seems to expect a boolean value here. This issue has been found using the following Coccinelle semantic patch written by Peter Senna Tschudin: @@ identifier f; constant C; typedef bool; @@ bool f (...){ <+... * return -C; ...+> } Reviewed-by: Alex Deucher Signed-off-by: Andrew Shadura Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/powerplay/hwmgr/hardwaremanager.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hardwaremanager.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hardwaremanager.c index 14f8c1f4da3d..0723758ed065 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hardwaremanager.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hardwaremanager.c @@ -272,7 +272,7 @@ bool phm_check_smc_update_required_for_display_configuration(struct pp_hwmgr *hw PHM_FUNC_CHECK(hwmgr); if (hwmgr->hwmgr_func->check_smc_update_required_for_display_configuration == NULL) - return -EINVAL; + return false; return hwmgr->hwmgr_func->check_smc_update_required_for_display_configuration(hwmgr); } -- 2.20.1