BACKPORT: perf/smmuv3: Remove the leftover put_cpu() in error path In…

… smmu_pmu_probe(), there is put_cpu() in the error path, which is wrong because we use raw_smp_processor_id() to get the cpu ID, not get_cpu(), remove it.

While we are at it, kill 'out_cpuhp_err' altogether and
just return err if we fail to add the hotplug instance.

This patch is belongs to series patches to supports SMMUv3 PMU.

Backport from: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/perf?h=v5.6-rc1&id=8ae4bcf4821c18a8fbfa0b2c1df26c1085e9d923

Acked-by: Robin Murphy <[email protected]>
Acked-by: Will Deacon <[email protected]>
Signed-off-by: Hanjun Guo <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>

drivers/perf/arm_smmuv3_pmu.c

@@ -781,7 +781,7 @@ static int smmu_pmu_probe(struct platform_device *pdev)
 	if (err) {
 		dev_err(dev, "Error %d registering hotplug, PMU @%pa\n",
 			err, &res_0->start);
-		goto out_cpuhp_err;
+		return err;
 	}
 
 	err = perf_pmu_register(&smmu_pmu->pmu, name, -1);
@@ -800,8 +800,6 @@ static int smmu_pmu_probe(struct platform_device *pdev)
 
 out_unregister:
 	cpuhp_state_remove_instance_nocalls(cpuhp_state_num, &smmu_pmu->node);
-out_cpuhp_err:
-	put_cpu();
 	return err;
 }