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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>
This commit is contained in:
Marc Zyngier 2016-09-06 15:34:44 +01:00 committed by Will Deacon
parent 98ab10e977
commit 282b879635
1 changed files with 5 additions and 6 deletions
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11
drivers/perf/arm_pmu.c
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@ -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);