[PATCH] drm: rcar-du: Fix a NULL vs IS_ERR() bug

[Dan Carpenter]

The drmm_encoder_alloc() function returns error pointers.  It never
returns NULL.  Fix the check accordingly.

Fixes: 7a1adbd23990 ("drm: rcar-du: Use drmm_encoder_alloc() to manage encoder")
Signed-off-by: Dan Carpenter <erro...@gmail.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c 
b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index b1787be31e92..7ecec7b04a8d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -109,8 +109,8 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
        renc = drmm_encoder_alloc(&rcdu->ddev, struct rcar_du_encoder, base,
                                  &rcar_du_encoder_funcs, DRM_MODE_ENCODER_NONE,
                                  NULL);
-       if (!renc)
-               return -ENOMEM;
+       if (IS_ERR(renc))
+               return PTR_ERR(renc);
 
        renc->output = output;
 
-- 
2.39.1