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perf: dsu: Use signed field for dsu_pmu->num_counters 

We set dsu_pmu->num_counters to -1, when the DSU is allocated
but not initialised when none of the CPUs are active in the DSU.
However, we use an unsigned field for num_counters. Switch this
to a signed field.

Fixes: 7520fa9924 ("perf: ARM DynamIQ Shared Unit PMU support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
hifive-unleashed-5.1
Suzuki K Poulose 2018-01-15 10:51:16 +00:00 committed by Catalin Marinas
parent 67948af41f
commit a22fde8e97
1 changed files with 1 additions and 1 deletions
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drivers/perf/arm_dsu_pmu.c
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@ -120,7 +120,7 @@ struct dsu_pmu {
cpumask_t associated_cpus;
cpumask_t active_cpu;
struct hlist_node cpuhp_node;
u8 num_counters;
s8 num_counters;
int irq;
DECLARE_BITMAP(cpmceid_bitmap, DSU_PMU_MAX_COMMON_EVENTS);
};