drm/mediatek: Use NULL instead of 0 for NULL pointer

[ Upstream commit 4744cde06f57dd6fbaac468663b1fe2f653eaa16 ]

Use NULL for NULL pointer to fix the following sparse warning:
drivers/gpu/drm/mediatek/mtk_drm_gem.c:265:27: sparse: warning: Using plain integer as NULL pointer

Fixes: f332c94f8c97 ("drm/mediatek: Implement gem prime vmap/vunmap function")
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20230111024443.24559-1-miles.chen@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
index b04a3c2b111e09f7dcebb6bbc628a0f8bf50915a..7ff6de44a9fa8810dca99468f144784285daefde 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -284,6 +284,6 @@ void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
                return;
 
        vunmap(vaddr);
-       mtk_gem->kvaddr = 0;
+       mtk_gem->kvaddr = NULL;
        kfree(mtk_gem->pages);
 }