linux-kernel - [PATCH] drm/amd/display: return status of abm_feature

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Date:   Thu, 20 Apr 2023 09:21:29 -0400
From:   Tom Rix <trix@...hat.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        Rodrigo.Siqueira@....com, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, Leon.Huang1@....com, wenjing.liu@....com,
        qingqing.zhuo@....com
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] drm/amd/display: return status of abm_feature_support

gcc with W=1 reports
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:
  In function ‘dmub_abm_set_event_ex’:
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_abm.c:138:22: error: variable
  ‘feature_support’ set but not used [-Werror=unused-but-set-variable]
  138 |         unsigned int feature_support;
      |                      ^~~~~~~~~~~~~~~

This variable is not used so remove it.
The status of amb_feature_support should have been returned, so
set ret and return it.

Fixes: b8fe56375f78 ("drm/amd/display: Refactor ABM feature")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
index a66f83a61402..8f285c3be4c6 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
@@ -134,10 +134,9 @@ static bool dmub_abm_set_pipe_ex(struct abm *abm, uint32_t otg_inst, uint32_t op
 static bool dmub_abm_set_event_ex(struct abm *abm, unsigned int full_screen, unsigned int video_mode,
 		unsigned int hdr_mode, unsigned int panel_inst)
 {
-	bool ret = false;
-	unsigned int feature_support;
+	bool ret;
 
-	feature_support = abm_feature_support(abm, panel_inst);
+	ret = abm_feature_support(abm, panel_inst);
 
 	return ret;
 }
-- 
2.27.0