diff options
| author | luanshi <zhangliguang@linux.alibaba.com> | 2020-02-26 08:45:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-25 10:25:47 +0300 |
| commit | 2c4e36033acee8304c2f24d9dd5092acfa1c18cb (patch) | |
| tree | a4f0dc60f67e0ee7875eccc8cea21d1cf8fd410e /drivers/perf | |
| parent | 1002a094e066f4e87d78022227b387138bfb0f0f (diff) | |
| download | linux-2c4e36033acee8304c2f24d9dd5092acfa1c18cb.tar.xz | |
drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer
[ Upstream commit 3ba52ad55b533760a1f65836aa0ec9d35e36bb4f ]
Fix bogus NULL checks on the return value of acpi_cpu_get_madt_gicc()
by checking for a 0 'gicc->performance_interrupt' value instead.
Signed-off-by: Liguang Zhang <zhangliguang@linux.alibaba.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm_pmu_acpi.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c index acce8781c456..f5c7a845cd7b 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) |