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Date: Wed, 26 Feb 2020 13:45:10 +0800 From: luanshi <zhangliguang@...ux.alibaba.com> To: Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, luanshi <zhangliguang@...ux.alibaba.com> Subject: [PATCH] arm_pmu: acpi: Fix incorrect checks of gicc Fix incorrect checks of NULL pointer gicc. Signed-off-by: Liguang Zhang <zhangliguang@...ux.alibaba.com> --- drivers/perf/arm_pmu_acpi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c index acce878..f5c7a84 100644 --- a/drivers/perf/arm_pmu_acpi.c +++ b/drivers/perf/arm_pmu_acpi.c @@ -24,8 +24,6 @@ static int arm_pmu_acpi_register_irq(int cpu) int gsi, trigger; gicc = acpi_cpu_get_madt_gicc(cpu); - if (WARN_ON(!gicc)) - return -EINVAL; gsi = gicc->performance_interrupt; @@ -64,11 +62,10 @@ static void arm_pmu_acpi_unregister_irq(int cpu) int gsi; gicc = acpi_cpu_get_madt_gicc(cpu); - if (!gicc) - return; gsi = gicc->performance_interrupt; - acpi_unregister_gsi(gsi); + if (gsi) + acpi_unregister_gsi(gsi); } #if IS_ENABLED(CONFIG_ARM_SPE_PMU) -- 1.8.3.1
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