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ARM: exynos: Clear global variable on init error path

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For most of Exynos SoCs, Power Management Unit (PMU) address space is
mapped into global variable 'pmu_base_addr' very early when initializing
PMU interrupt controller.  A lot of other machine code depends on it so
when doing iounmap() on this address, clear the global as well to avoid
usage of invalid value (pointing to unmapped memory region).

Properly mapped PMU address space is a requirement for all other machine
code so this fix is purely theoretical.  Boot will fail immediately in
many other places after following this error path.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2018-07-24 18:48:14 +02:00
parent e89549a596
commit cd4806911c
1 changed files with 1 additions and 0 deletions
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1
arch/arm/mach-exynos/suspend.c
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@ -203,6 +203,7 @@ static int __init exynos_pmu_irq_init(struct device_node *node,
NULL);
if (!domain) {
iounmap(pmu_base_addr);
pmu_base_addr = NULL;
return -ENOMEM;
}