linux-kernel - [PATCH v1] drm/panel: nt36523: fix parameter check in nt36523

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Date:   Thu, 13 Jul 2023 17:53:27 +0800
From:   Minjie Du <duminjie@...o.com>
To:     Jianhua Lu <lujianhua000@...il.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org (open list:DRM PANEL DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     opensource.kernel@...o.com, Minjie Du <duminjie@...o.com>
Subject: [PATCH v1] drm/panel: nt36523: fix parameter check in nt36523_probe()

Make IS_ERR() judge the mipi_dsi_device_register_full() function return
in nt36523_probe().

Signed-off-by: Minjie Du <duminjie@...o.com>
---
 drivers/gpu/drm/panel/panel-novatek-nt36523.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36523.c b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
index c3befa7f2..3823255a9 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt36523.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
@@ -1266,7 +1266,7 @@ static int nt36523_probe(struct mipi_dsi_device *dsi)
 			return dev_err_probe(dev, -EPROBE_DEFER, "cannot get secondary DSI host\n");
 
 		pinfo->dsi[1] = mipi_dsi_device_register_full(dsi1_host, info);
-		if (!pinfo->dsi[1]) {
+		if (IS_ERR(pinfo->dsi[1])) {
 			dev_err(dev, "cannot get secondary DSI device\n");
 			return -ENODEV;
 		}
-- 
2.39.0