[PATCH 5.4 106/165] perf/smmuv3: Remove the leftover put_cpu() in error path

Greg Kroah-Hartman
2020-01-11T10:31:10Z

From: Hanjun Guo <guohanjun@huawei.com>

[ Upstream commit 8ae4bcf4821c18a8fbfa0b2c1df26c1085e9d923 ]

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.

Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/perf/arm_smmuv3_pmu.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index abcf54f7d19c..191f410cf35c 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -815,7 +815,7 @@ 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);
@@ -834,8 +834,6 @@ 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;
}

--
2.20.1