[PATCH -next] drm/hisilicon: Fix return value check in ade_dts_parse()

[weiyj_lk]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

In case of error, the function devm_clk_get() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_...@trendmicro.com.cn>
---
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c 
b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
index ed76baad..16834f4 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
@@ -965,21 +965,21 @@ static int ade_dts_parse(struct platform_device *pdev, 
struct ade_hw_ctx *ctx)
        }
 
        ctx->ade_core_clk = devm_clk_get(dev, "clk_ade_core");
-       if (!ctx->ade_core_clk) {
+       if (IS_ERR(ctx->ade_core_clk)) {
                DRM_ERROR("failed to parse clk ADE_CORE\n");
-               return -ENODEV;
+               return PTR_ERR(ctx->ade_core_clk);
        }
 
        ctx->media_noc_clk = devm_clk_get(dev, "clk_codec_jpeg");
-       if (!ctx->media_noc_clk) {
+       if (IS_ERR(ctx->media_noc_clk)) {
                DRM_ERROR("failed to parse clk CODEC_JPEG\n");
-           return -ENODEV;
+               return PTR_ERR(ctx->media_noc_clk);
        }
 
        ctx->ade_pix_clk = devm_clk_get(dev, "clk_ade_pix");
-       if (!ctx->ade_pix_clk) {
+       if (IS_ERR(ctx->ade_pix_clk)) {
                DRM_ERROR("failed to parse clk ADE_PIX\n");
-           return -ENODEV;
+               return PTR_ERR(ctx->ade_pix_clk);
        }
 
        return 0;