diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-cti-sysfs.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-cti-sysfs.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c index 6d59c815ecf5..e528cff9d4e2 100644 --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c @@ -84,8 +84,8 @@ static ssize_t enable_show(struct device *dev, bool enabled, powered; struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); - enable_req = atomic_read(&drvdata->config.enable_req_count); spin_lock(&drvdata->spinlock); + enable_req = drvdata->config.enable_req_count; powered = drvdata->config.hw_powered; enabled = drvdata->config.hw_enabled; spin_unlock(&drvdata->spinlock); @@ -108,10 +108,19 @@ static ssize_t enable_store(struct device *dev, if (ret) return ret; - if (val) + if (val) { + ret = pm_runtime_resume_and_get(dev->parent); + if (ret) + return ret; ret = cti_enable(drvdata->csdev); - else + if (ret) + pm_runtime_put(dev->parent); + } else { ret = cti_disable(drvdata->csdev); + if (!ret) + pm_runtime_put(dev->parent); + } + if (ret) return ret; return size; |