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ARM: hisi: fix error handling and missing of_node_put

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[ Upstream commit 9f30b5ae0585ca5234fe979294b8f897299dec99 ]

of_iomap() can return NULL which seems critical here and thus should be
explicitly flagged so that the cause of system halting can be understood.
As of_find_compatible_node() is returning a device node with refcount
incremented it must be explicitly decremented here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: commit 7fda91e731 ("ARM: hisi: enable smp for HiP01")
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicholas Mc Guire 2018-07-12 11:28:22 +02:00 • committed by Greg Kroah-Hartman
parent 96d4584f78
commit eafee07179
1 changed files with 4 additions and 4 deletions
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8
arch/arm/mach-hisi/hotplug.c
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@ -226,10 +226,10 @@ void hip01_set_cpu(int cpu, bool enable)
if (!ctrl_base) {
np = of_find_compatible_node(NULL, NULL, "hisilicon,hip01-sysctrl");
if (np)
ctrl_base = of_iomap(np, 0);
else
BUG();
BUG_ON(!np);
ctrl_base = of_iomap(np, 0);
of_node_put(np);
BUG_ON(!ctrl_base);
}
if (enable) {