In function nt35950_probe(), mipi_dsi_device_register_full() is called to create a MIPI DSI device. If it fails, a pointer encoded with an error will be returned, so use IS_ERR() to check the return value. Besides, use PTR_ERR to return the actual errno.

Signed-off-by: Lu Wei luwei32@huawei.com --- drivers/gpu/drm/panel/panel-novatek-nt35950.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/drm/panel/panel-novatek-nt35950.c index 288c7fa83ecc..d252e5e56228 100644 --- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c @@ -579,9 +579,9 @@ static int nt35950_probe(struct mipi_dsi_device *dsi) }

nt->dsi[1] = mipi_dsi_device_register_full(dsi_r_host, info); - if (!nt->dsi[1]) { + if (IS_ERR(nt->dsi[1])) { dev_err(dev, "Cannot get secondary DSI node\n"); - return -ENODEV; + return PTR_ERR(nt->dsi[1]); } num_dsis++; }