Commit 52efe364d196 ("drm/vc4: hvs: Don't write gamma luts on 2711")
added a return path to vc4_hvs_lut_load that had called
drm_dev_enter, but not drm_dev_exit.

Ensure we call drm_dev_exit.

Fixes: 52efe364d196 ("drm/vc4: hvs: Don't write gamma luts on 2711")
Reported-by: Marek Szyprowski <m.szyprow...@samsung.com>
Closes: 
https://lore.kernel.org/dri-devel/37051126-3921-4afe-a936-5f828bff5...@samsung.com/
Signed-off-by: Dave Stevenson <dave.steven...@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index 2a366a607fcc..546ee11016b2 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -225,7 +225,7 @@ static void vc4_hvs_lut_load(struct vc4_hvs *hvs,
                return;
 
        if (hvs->vc4->gen == VC4_GEN_4)
-               return;
+               goto exit;
 
        /* The LUT memory is laid out with each HVS channel in order,
         * each of which takes 256 writes for R, 256 for G, then 256
@@ -242,6 +242,7 @@ static void vc4_hvs_lut_load(struct vc4_hvs *hvs,
        for (i = 0; i < crtc->gamma_size; i++)
                HVS_WRITE(SCALER_GAMDATA, vc4_crtc->lut_b[i]);
 
+exit:
        drm_dev_exit(idx);
 }
 

-- 
2.34.1

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