diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-stm.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-stm.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index b2ccbe989ff8..ff578762f6bf 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -193,17 +193,15 @@ static void stm_enable_hw(struct stm_drvdata *drvdata) static int stm_enable(struct coresight_device *csdev, struct perf_event *event, enum cs_mode mode) { - u32 val; struct stm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); if (mode != CS_MODE_SYSFS) return -EINVAL; - val = local_cmpxchg(&csdev->mode, CS_MODE_DISABLED, mode); - - /* Someone is already using the tracer */ - if (val) + if (!coresight_take_mode(csdev, mode)) { + /* Someone is already using the tracer */ return -EBUSY; + } pm_runtime_get_sync(csdev->dev.parent); |