diff options
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 24e2347be6b1..88b0941ce51e 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -343,19 +343,25 @@ validate_group(struct perf_event *event) { struct perf_event *sibling, *leader = event->group_leader; struct pmu_hw_events fake_pmu; + DECLARE_BITMAP(fake_used_mask, ARMPMU_MAX_HWEVENTS); - memset(&fake_pmu, 0, sizeof(fake_pmu)); + /* + * Initialise the fake PMU. We only need to populate the + * used_mask for the purposes of validation. + */ + memset(fake_used_mask, 0, sizeof(fake_used_mask)); + fake_pmu.used_mask = fake_used_mask; if (!validate_event(&fake_pmu, leader)) - return -ENOSPC; + return -EINVAL; list_for_each_entry(sibling, &leader->sibling_list, group_entry) { if (!validate_event(&fake_pmu, sibling)) - return -ENOSPC; + return -EINVAL; } if (!validate_event(&fake_pmu, event)) - return -ENOSPC; + return -EINVAL; return 0; } @@ -396,6 +402,9 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu) int i, err, irq, irqs; struct platform_device *pmu_device = armpmu->plat_device; + if (!pmu_device) + return -ENODEV; + err = reserve_pmu(armpmu->type); if (err) { pr_warning("unable to reserve pmu\n"); @@ -631,6 +640,9 @@ static struct platform_device_id armpmu_plat_device_ids[] = { static int __devinit armpmu_device_probe(struct platform_device *pdev) { + if (!cpu_pmu) + return -ENODEV; + cpu_pmu->plat_device = pdev; return 0; } |