diff options
| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2019-04-25 13:52:55 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 22:00:16 +0200 |
| commit | 6c817a95d84b8388e97d4e2b6ee361a660e244e9 (patch) | |
| tree | d75b790e06594a6725d944ab3150c8822c57391f /drivers/hwtracing/coresight/coresight.c | |
| parent | a54e14f810f257d782ddf2fde1df5f3819e612a8 (diff) | |
coresight: Adding return code to sink::disable() operation
In preparation to handle device reference counting inside of the sink
drivers, add a return code to the sink::disable() operation so that
proper action can be taken if a sink has not been disabled.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Robert Walker <robert.walker@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c index 55204dd47479..66c25b0a785e 100644 --- a/drivers/hwtracing/coresight/coresight.c +++ b/drivers/hwtracing/coresight/coresight.c @@ -239,9 +239,13 @@ static int coresight_enable_sink(struct coresight_device *csdev, static void coresight_disable_sink(struct coresight_device *csdev) { + int ret; + if (atomic_dec_return(csdev->refcnt) == 0) { if (sink_ops(csdev)->disable) { - sink_ops(csdev)->disable(csdev); + ret = sink_ops(csdev)->disable(csdev); + if (ret) + return; csdev->enable = false; } } |