diff options
| author | Stefan Agner | 2018-07-07 23:16:56 +0200 |
|---|---|---|
| committer | Will Deacon | 2018-07-09 13:29:43 +0100 |
| commit | 64b2f025715a68bed49fb14588c2d893dfbd00a8 (patch) | |
| tree | 2e0212310846e63316e1eaa82f4c6d2180e20dd6 | |
| parent | 59b62e7ad0874681dc4f84cac90cc991dc265809 (diff) | |
arm: perf: prevent unbind/bind via sysfs
Unbinding and rebinding the ARM PMU driver via sysfs leads to a
warning followed by more errors:
WARNING: CPU: 0 PID: 217 at kernel/irq/chip.c:1034 irq_modify_status+0x150/0x16c
..
genirq: Flags mismatch irq 19. 00010c04 (arm-pmu) vs. 00010c04 (arm-pmu)
hw perfevents: unable to request IRQ19 for ARM PMU counters
hw perfevents: /pmu: failed to register PMU devices!
armv7-pmu: probe of pmu failed with error -16
The driver is clearly not designed to be removed. Disable bind/
unbind for this driver.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm/kernel/perf_event_v7.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c index 57f01e059f39..5a5116794440 100644 --- a/arch/arm/kernel/perf_event_v7.c +++ b/arch/arm/kernel/perf_event_v7.c @@ -2030,6 +2030,7 @@ static struct platform_driver armv7_pmu_driver = { .driver = { .name = "armv7-pmu", .of_match_table = armv7_pmu_of_device_ids, + .suppress_bind_attrs = true, }, .probe = armv7_pmu_device_probe, }; |