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cpufreq: mediatek: fix passing zero to 'PTR_ERR' 

[ Upstream commit d51c632309 ]

In order to prevent passing zero to 'PTR_ERR' in
mtk_cpu_dvfs_info_init(), we fix the return value of of_get_cci() using
error pointer by explicitly casting error number.

Signed-off-by: Jia-Wei Chang <jia-wei.chang@mediatek.com>
Fixes: 0daa47325b ("cpufreq: mediatek: Link CCI device to CPU")
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jia-Wei Chang 2023-03-24 18:11:27 +08:00 committed by Greg Kroah-Hartman
parent f977dbefea
commit bd1c006872
1 changed files with 5 additions and 5 deletions
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10
drivers/cpufreq/mediatek-cpufreq.c
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@ -373,13 +373,13 @@ static struct device *of_get_cci(struct device *cpu_dev)
struct platform_device *pdev;
np = of_parse_phandle(cpu_dev->of_node, "mediatek,cci", 0);
if (IS_ERR_OR_NULL(np))
return NULL;
if (!np)
return ERR_PTR(-ENODEV);
pdev = of_find_device_by_node(np);
of_node_put(np);
if (IS_ERR_OR_NULL(pdev))
return NULL;
if (!pdev)
return ERR_PTR(-ENODEV);
return &pdev->dev;
}
@ -401,7 +401,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
info->ccifreq_bound = false;
if (info->soc_data->ccifreq_supported) {
info->cci_dev = of_get_cci(info->cpu_dev);
if (IS_ERR_OR_NULL(info->cci_dev)) {
if (IS_ERR(info->cci_dev)) {
ret = PTR_ERR(info->cci_dev);
dev_err(cpu_dev, "cpu%d: failed to get cci device\n", cpu);
return -ENODEV;