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ARM: hisi: handle of_iomap and fix missing of_node_put

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Relying on an unchecked of_iomap() which can return NULL is problematic
here, an explicit check seems mandatory. Also the call to
of_find_compatible_node() returns a device node with refcount incremented
therefor an explicit of_node_put() is needed here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: commit 22bae42904 ("ARM: hi3xxx: add hotplug support")
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
This commit is contained in:
Nicholas Mc Guire 2018-07-12 11:28:24 +02:00 committed by Wei Xu
parent 81646a3d39
commit d396cb185c
1 changed files with 13 additions and 6 deletions
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17
arch/arm/mach-hisi/hotplug.c
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@ -148,15 +148,22 @@ static int hi3xxx_hotplug_init(void)
struct device_node *node;
node = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
if (node) {
ctrl_base = of_iomap(node, 0);
id = HI3620_CTRL;
return 0;
}
if (!node) {
id = ERROR_CTRL;
return -ENOENT;
}
ctrl_base = of_iomap(node, 0);
of_node_put(node);
if (!ctrl_base) {
id = ERROR_CTRL;
return -ENOMEM;
}
id = HI3620_CTRL;
return 0;
}
void hi3xxx_set_cpu(int cpu, bool enable)
{
if (!ctrl_base) {