diff options
| author |   Marc Zyngier <marc.zyngier@arm.com> | 2016-09-06 15:34:44 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2016-09-06 18:26:33 +0100 |
| commit | 282b87963556a971f9acbe3d430991b80480541a (patch) | |
| tree | 011dc587ee908f008dfee238e7db628a5eb3d825 /drivers/perf | |
| parent | arm64: ftrace: add save_stack_trace_regs() (diff) | |
| download | linux-dev-282b87963556a971f9acbe3d430991b80480541a.tar.xz linux-dev-282b87963556a971f9acbe3d430991b80480541a.zip | |
drivers/perf: arm_pmu: Always consider IRQ0 as an error
As declared by the chief penguin, and enforced by the NO_IRQ brigade,
IRQ0 doesn't exist, and is considered as an error (no irq).
Unfortunately, the arm_pmu driver still considers it as valid in
a large number of cases. Let's fix this.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm_pmu.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index c494613c1909..193a68cc2af4 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -602,7 +602,7 @@ static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu) irqs = min(pmu_device->num_resources, num_possible_cpus()); irq = platform_get_irq(pmu_device, 0); - if (irq >= 0 && irq_is_percpu(irq)) { + if (irq > 0 && irq_is_percpu(irq)) { on_each_cpu_mask(&cpu_pmu->supported_cpus, cpu_pmu_disable_percpu_irq, &irq, 1); free_percpu_irq(irq, &hw_events->percpu_pmu); @@ -616,7 +616,7 @@ static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu) if (!cpumask_test_and_clear_cpu(cpu, &cpu_pmu->active_irqs)) continue; irq = platform_get_irq(pmu_device, i); - if (irq >= 0) + if (irq > 0) free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, cpu)); } } @@ -638,7 +638,7 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler) } irq = platform_get_irq(pmu_device, 0); - if (irq >= 0 && irq_is_percpu(irq)) { + if (irq > 0 && irq_is_percpu(irq)) { err = request_percpu_irq(irq, handler, "arm-pmu", &hw_events->percpu_pmu); if (err) { @@ -919,7 +919,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu) /* Check the IRQ type and prohibit a mix of PPIs and SPIs */ irq = platform_get_irq(pdev, i); - if (irq >= 0) { + if (irq > 0) { bool spi = !irq_is_percpu(irq); if (i > 0 && spi != using_spi) { @@ -969,8 +969,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu) if (cpumask_weight(&pmu->supported_cpus) == 0) { int irq = platform_get_irq(pdev, 0); - if (irq_is_percpu(irq)) { - /* If using PPIs, check the affinity of the partition */ + if (irq > 0 && irq_is_percpu(irq)) { int ret; ret = irq_get_percpu_devid_partition(irq, &pmu->supported_cpus); |