From 8d7d33f6be06f929ac2c5e8ea2323fec272790d4 Mon Sep 17 00:00:00 2001 From: Wang Xiaojun Date: Wed, 11 Nov 2020 11:14:52 +0800 Subject: [PATCH] drm: rcar-du: Fix the return check of of_parse_phandle and of_find_device_by_node of_parse_phandle and of_find_device_by_node may return NULL which cannot be checked by IS_ERR. Fixes: 8de707aeb452 ("drm: rcar-du: kms: Initialize CMM instances") Signed-off-by: Wang Xiaojun Reported-by: Hulk Robot Acked-by: Jacopo Mondi Reviewed-by: Geert Uytterhoeven Reviewed-by: Kieran Bingham [Replace -ENODEV with -EINVAL] Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- drivers/gpu/drm/rcar-du/rcar_du_kms.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index d6b71a9361ca..92dfa3d4c011 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c @@ -700,10 +700,10 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu) int ret; cmm = of_parse_phandle(np, "renesas,cmms", i); - if (IS_ERR(cmm)) { + if (!cmm) { dev_err(rcdu->dev, "Failed to parse 'renesas,cmms' property\n"); - return PTR_ERR(cmm); + return -EINVAL; } if (!of_device_is_available(cmm)) { @@ -713,10 +713,10 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu) } pdev = of_find_device_by_node(cmm); - if (IS_ERR(pdev)) { + if (!pdev) { dev_err(rcdu->dev, "No device found for CMM%u\n", i); of_node_put(cmm); - return PTR_ERR(pdev); + return -EINVAL; } of_node_put(cmm); -- 2.11.0