From: luanshi <zhangliguang@linux.alibaba.com>
To: Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
luanshi <zhangliguang@linux.alibaba.com>
Subject: [PATCH] arm_pmu: acpi: Fix incorrect checks of gicc
Date: Wed, 26 Feb 2020 13:45:10 +0800 [thread overview]
Message-ID: <1582695910-46288-1-git-send-email-zhangliguang@linux.alibaba.com> (raw)
Fix incorrect checks of NULL pointer gicc.
Signed-off-by: Liguang Zhang <zhangliguang@linux.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
reply other threads:[~2020-02-26 5:45 UTC|newest]
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