[PATCH] drivers/perf: arm_pmu: make info messages more verbose

On a big.LITTLE system e.g. with Cortex A57 and A53 in case not all cores
are online at PMU probe time we might get

hw perfevents: failed to probe PMU!
hw perfevents: failed to register PMU devices!

making it unclear which cores failed, here.

Add the name of the PMU which failed resulting in a more verbose and
helpful message

hw perfevents: armv8_cortex_a53: failed to probe PMU!
hw perfevents: armv8_cortex_a53: failed to register PMU devices!

Signed-off-by: Dirk Behme <redacted>
---
  drivers/perf/arm_pmu.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index be3755c..fc1f06f 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c

@@ -904,7 +904,7 @@ int arm_pmu_device_probe(struct platform_device *pdev,
  	}

  	if (ret) {
-		pr_info("failed to probe PMU!\n");
+		pr_info("%s: failed to probe PMU!\n", pmu->name);
  		goto out_free;
  	}

@@ -921,7 +921,7 @@ int arm_pmu_device_probe(struct platform_device *pdev,
  out_destroy:
  	cpu_pmu_destroy(pmu);
  out_free:
-	pr_info("failed to register PMU devices!\n");
+	pr_info("%s: failed to register PMU devices!\n", pmu->name);
  	kfree(pmu);
  	return ret;
  }