Merge "PM / devfreq: memlat: add missing alloc check in start_hwmon"

static int start_hwmon(struct memlat_hwmon *hw)

{

	int ret = 0;

	struct perf_event_attr *attr = alloc_attr();

	unsigned int cpu;

	struct memlat_mon *mon = to_mon(hw);

	struct memlat_cpu_grp *cpu_grp = mon->cpu_grp;

	bool should_init_cpu_grp;

	struct perf_event_attr *attr = alloc_attr();

	if (!attr)

		return -ENOMEM;

	mutex_lock(&cpu_grp->mons_lock);

	should_init_cpu_grp = !(cpu_grp->num_active_mons++);