drm/tegra: dc: Using NULL instead of plain integer

Fixes the following sparse warnings:

drivers/gpu/drm/tegra/dc.c:2181:69: warning:
  Using plain integer as NULL pointer

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index c1a5ae8..90b25ce 100644 (file)
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2160,7 +2160,7 @@ static int tegra_dc_couple(struct tegra_dc *dc)
                struct device_link *link;
                struct device *partner;
 
-               partner = driver_find_device(dc->dev->driver, NULL, 0,
+               partner = driver_find_device(dc->dev->driver, NULL, NULL,
                                             tegra_dc_match_by_pipe);
                if (!partner)
                        return -EPROBE_DEFER;