Revision 0933840acf7b65d6d30a5b6089d882afea57aca3 authored by Jiri Olsa on 20 October 2016, 11:10:11 UTC, committed by Ingo Molnar on 28 October 2016, 09:06:25 UTC
CAI Qian reported a crash in the PMU uncore device removal code, enabled by the CONFIG_DEBUG_TEST_DRIVER_REMOVE=y option: https://marc.info/?l=linux-kernel&m=147688837328451 The reason for the crash is that perf_pmu_unregister() tries to remove a PMU device which is not added at this point. We add PMU devices only after pmu_bus is registered, which happens in the perf_event_sysfs_init() call and sets the 'pmu_bus_running' flag. The fix is to get the 'pmu_bus_running' flag state at the point the PMU is taken out of the PMU list and remove the device later only if it's set. Reported-by: CAI Qian <caiqian@redhat.com> Tested-by: CAI Qian <caiqian@redhat.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rob Herring <robh@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161020111011.GA13361@krava Signed-off-by: Ingo Molnar <mingo@kernel.org>
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File | Mode | Size |
---|---|---|
accel | ||
adc | ||
amplifiers | ||
buffer | ||
chemical | ||
common | ||
dac | ||
dummy | ||
frequency | ||
gyro | ||
health | ||
humidity | ||
imu | ||
light | ||
magnetometer | ||
orientation | ||
potentiometer | ||
pressure | ||
proximity | ||
temperature | ||
trigger | ||
Kconfig | -rw-r--r-- | 2.6 KB |
Makefile | -rw-r--r-- | 890 bytes |
iio_core.h | -rw-r--r-- | 2.5 KB |
iio_core_trigger.h | -rw-r--r-- | 1.3 KB |
industrialio-buffer.c | -rw-r--r-- | 35.2 KB |
industrialio-configfs.c | -rw-r--r-- | 1.2 KB |
industrialio-core.c | -rw-r--r-- | 41.9 KB |
industrialio-event.c | -rw-r--r-- | 14.3 KB |
industrialio-sw-device.c | -rw-r--r-- | 4.2 KB |
industrialio-sw-trigger.c | -rw-r--r-- | 4.2 KB |
industrialio-trigger.c | -rw-r--r-- | 18.9 KB |
industrialio-triggered-event.c | -rw-r--r-- | 2.3 KB |
inkern.c | -rw-r--r-- | 16.8 KB |
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