[PATCH] platform: video-mux: fix ptr_ret.cocci warnings

[kbuild test robot]

drivers/media/platform/video-mux.c:246:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

CC: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
---

 video-mux.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/media/platform/video-mux.c
+++ b/drivers/media/platform/video-mux.c
@@ -243,10 +243,7 @@ static int video_mux_probe_mmio_mux(stru
 	field.lsb = ffs(mask) - 1;
 
 	vmux->field = devm_regmap_field_alloc(dev, regmap, field);
-	if (IS_ERR(vmux->field))
-		return PTR_ERR(vmux->field);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(vmux->field);
 }
 #endif