3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Nicholas Mc Guire <hof...@osadl.org> [ Upstream commit 81646a3d39ef14749301374a3a0b8311384cd412 ] of_find_compatible_node() returns a device node with refcount incremented and thus needs an explicit of_node_put(). Further relying on an unchecked of_iomap() which can return NULL is problematic here, after all ctrl_base is critical enough for hix5hd2_set_cpu() to call BUG() if not available so a check seems mandated here. Signed-off-by: Nicholas Mc Guire <hof...@osadl.org> 0002 Fixes: commit 06cc5c1d4d73 ("ARM: hisi: enable hix5hd2 SoC") Signed-off-by: Wei Xu <xuw...@hisilicon.com> Signed-off-by: Sasha Levin <alexander.le...@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/arm/mach-hisi/hotplug.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) --- a/arch/arm/mach-hisi/hotplug.c +++ b/arch/arm/mach-hisi/hotplug.c @@ -177,11 +177,15 @@ static bool hix5hd2_hotplug_init(void) struct device_node *np; np = of_find_compatible_node(NULL, NULL, "hisilicon,cpuctrl"); - if (np) { - ctrl_base = of_iomap(np, 0); - return true; - } - return false; + if (!np) + return false; + + ctrl_base = of_iomap(np, 0); + of_node_put(np); + if (!ctrl_base) + return false; + + return true; } void hix5hd2_set_cpu(int cpu, bool enable)