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>
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@ -2030,6 +2030,7 @@ static struct platform_driver armv7_pmu_driver = {
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.driver = {
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.name = "armv7-pmu",
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.of_match_table = armv7_pmu_of_device_ids,
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.suppress_bind_attrs = true,
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},
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.probe = armv7_pmu_device_probe,
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};
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