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Commit 4b59da95 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "tmc-etr: Check if it is mode switch action during disable etr"

parents fc3cca74 0f06d1e6

drivers/hwtracing/coresight/coresight-tmc-etr.c

+5 −4
Original line number Diff line number Diff line
@@ -1925,7 +1925,8 @@ static int tmc_enable_etr_sink(struct coresight_device *csdev, 
	return -EINVAL;

}



static int _tmc_disable_etr_sink(struct coresight_device *csdev)

static int _tmc_disable_etr_sink(struct coresight_device *csdev,

			bool mode_switch)

{

	unsigned long flags;

	struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
@@ -1937,7 +1938,7 @@ static int _tmc_disable_etr_sink(struct coresight_device *csdev) 
		return -EBUSY;

	}



	if (atomic_dec_return(csdev->refcnt)) {

	if (atomic_dec_return(csdev->refcnt) && !mode_switch) {

		spin_unlock_irqrestore(&drvdata->spinlock, flags);

		return -EBUSY;

	}
@@ -1985,7 +1986,7 @@ static int tmc_disable_etr_sink(struct coresight_device *csdev) 
	int ret;



	mutex_lock(&drvdata->mem_lock);

	ret = _tmc_disable_etr_sink(csdev);

	ret = _tmc_disable_etr_sink(csdev, false);

	mutex_unlock(&drvdata->mem_lock);

	return ret;

}
@@ -2016,7 +2017,7 @@ int tmc_etr_switch_mode(struct tmc_drvdata *drvdata, const char *out_mode) 
	}



	coresight_disable_all_source_link();

	_tmc_disable_etr_sink(drvdata->csdev);

	_tmc_disable_etr_sink(drvdata->csdev, true);

	old_mode = drvdata->out_mode;

	drvdata->out_mode = new_mode;

	if (tmc_enable_etr_sink_sysfs(drvdata->csdev)) {