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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 device tree full name which failed and the error value resulting
in a more verbose and helpful message like

hw perfevents: /soc/pmu_a53: failed to probe PMU! Error -6
hw perfevents: /soc/pmu_a53: failed to register PMU devices! Error -6

Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Dirk Behme 2016-02-04 18:06:10 +01:00 committed by Will Deacon
parent 8d1a0ae724
commit c6b90653f1
1 changed files with 4 additions and 2 deletions
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6
drivers/perf/arm_pmu.c
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@ -907,7 +907,8 @@ int arm_pmu_device_probe(struct platform_device *pdev,
} }
if (ret) { if (ret) {
pr_info("failed to probe PMU!\n"); pr_info("%s: failed to probe PMU! Error %i\n",
node->full_name, ret);
goto out_free; goto out_free;
} }
@ -927,7 +928,8 @@ int arm_pmu_device_probe(struct platform_device *pdev,
out_destroy: out_destroy:
cpu_pmu_destroy(pmu); cpu_pmu_destroy(pmu);
out_free: out_free:
pr_info("failed to register PMU devices!\n"); pr_info("%s: failed to register PMU devices! Error %i\n",
node->full_name, ret);
kfree(pmu); kfree(pmu);
return ret; return ret;
} }