From 8d7d33f6be06f929ac2c5e8ea2323fec272790d4 Mon Sep 17 00:00:00 2001
From: Wang Xiaojun <wangxiaojun11@huawei.com>
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
Git-commit: 8d7d33f6be06f929ac2c5e8ea2323fec272790d4
Patch-mainline: v5.12-rc1
References: git-fixes
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 <wangxiaojun11@huawei.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
[Replace -ENODEV with -EINVAL]
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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);
--
2.26.2