diff options
| author | James Clark <james.clark@arm.com> | 2024-01-29 15:40:41 +0000 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2024-02-12 10:21:38 +0000 |
| commit | d724f65218b994da234081df5dfe417c23802a65 (patch) | |
| tree | 4e9ffdd813269f25fbdfdbe89ff7e3db5faf744f /drivers/hwtracing/coresight/coresight-etm3x-core.c | |
| parent | 812265e26ed3ac76d3a131709d8755bafcf31b58 (diff) | |
coresight: Add helper for atomically taking the device
Now that mode is in struct coresight_device, this pattern can be wrapped
in a helper.
Signed-off-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20240129154050.569566-11-james.clark@arm.com
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-etm3x-core.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm3x-core.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c index de53c3e8db29..c301f6a5f065 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c @@ -556,14 +556,12 @@ static int etm_enable(struct coresight_device *csdev, struct perf_event *event, enum cs_mode mode) { int ret; - u32 val; struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - val = local_cmpxchg(&drvdata->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; + } switch (mode) { case CS_MODE_SYSFS: |