coresight: catu: Claim device before use (f92201b1) · Commits · 戴 / test

Use the CLAIM protocol to grab the ownership of the component when in use. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by:

drivers/hwtracing/coresight/coresight-catu.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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;