[PATCH next] drm/vc4: unlock on error in vc4_hvs_get_fifo_frame_count()

[Dan Carpenter]

Presumably the default path is never used.  However, if it were used for
some reason then call drm_dev_exit() before returning.

Fixes: 8f2fc64773be ("drm/vc4: Fix reading of frame count on GEN5 / Pi4")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index b42027636c71..4f524ec126e7 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -522,7 +522,7 @@ u8 vc4_hvs_get_fifo_frame_count(struct vc4_hvs *hvs, 
unsigned int fifo)
                break;
        default:
                drm_err(drm, "Unknown VC4 generation: %d", vc4->gen);
-               return 0;
+               field = 0;
        }
 
        drm_dev_exit(idx);
-- 
2.45.2