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| author |   Stefan Agner <stefan@agner.ch> | 2018-07-07 23:16:56 +0200 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-07-09 13:29:43 +0100 |
| commit | 64b2f025715a68bed49fb14588c2d893dfbd00a8 (patch) | |
| tree | 2e0212310846e63316e1eaa82f4c6d2180e20dd6 /include/linux/perf/arm_pmu.h | |
| parent | drivers/perf: Initialise return value in armpmu_request_irqs() (diff) | |
| download | linux-dev-64b2f025715a68bed49fb14588c2d893dfbd00a8.tar.xz linux-dev-64b2f025715a68bed49fb14588c2d893dfbd00a8.zip | |
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>
Diffstat (limited to 'include/linux/perf/arm_pmu.h')
0 files changed, 0 insertions, 0 deletions