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drm: rcar-du: Fix the return check of of_parse_phandle and of_find_device_by_node

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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>
This commit is contained in:
Wang Xiaojun 2020-11-11 11:14:52 +08:00 committed by Laurent Pinchart
parent 3a608bcbb9
commit 8d7d33f6be
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/rcar-du/rcar_du_kms.c
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@ -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);