Use the CLAIM protocol to grab the ownership of the component when in use.
Cc: Mathieu Poirier mathieu.poirier@linaro.org Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com --- drivers/hwtracing/coresight/coresight-catu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index ff94e58..170fbb6 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -406,6 +406,7 @@ static inline int catu_wait_for_ready(struct catu_drvdata *drvdata)
static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) { + int rc; u32 control, mode; struct etr_buf *etr_buf = data;
@@ -418,6 +419,10 @@ static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) return -EBUSY; }
+ rc = coresight_claim_device_unlocked(drvdata->base); + if (rc) + return rc; + control |= BIT(CATU_CONTROL_ENABLE);
if (etr_buf && etr_buf->mode == ETR_MODE_CATU) { @@ -459,6 +464,7 @@ static int catu_disable_hw(struct catu_drvdata *drvdata) int rc = 0;
catu_write_control(drvdata, 0); + coresight_disclaim_device_unlocked(drvdata->base); if (catu_wait_for_ready(drvdata)) { dev_info(drvdata->dev, "Timeout while waiting for READY\n"); rc = -EAGAIN;