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author | Nicholas Mc Guire <hofrat@osadl.org> | 2018-07-12 12:28:22 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 09:35:09 +0300 |
commit | eafee0717962080c0ff2f26cecb17525d8d7091e (patch) | |
tree | ffd1edfb257c43fdcc7aeaf464cc17a253c04ac6 /arch/arm | |
parent | 96d4584f786f1809ba6cd092fb4bfdff15e81d9b (diff) | |
download | linux-eafee0717962080c0ff2f26cecb17525d8d7091e.tar.xz |
ARM: hisi: fix error handling and missing of_node_put
[ 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 7fda91e73155 ("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>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mach-hisi/hotplug.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm/mach-hisi/hotplug.c b/arch/arm/mach-hisi/hotplug.c index 3f28c9141b48..32870560b280 100644 --- a/arch/arm/mach-hisi/hotplug.c +++ b/arch/arm/mach-hisi/hotplug.c @@ -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) { |