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Commit 2c6fd882 authored by Mulu He's avatar Mulu He Committed by Gerrit - the friendly Code Review server
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coresight: tmc: Fix buffer size can't change issue 



The sysfs interface "buffer_size" is not workable due to drvdata->etr_buf
is valid. When the buffer size changed by userspace, the memory did not
re-allocated. To fix this free allocated memory when ETR sink is disabled.

Change-Id: I3a8b85408a60c4f54a2ff5b6ac83236ed1c985c5
Signed-off-by: default avatarMulu He <muluhe@codeaurora.org>
parent 0e75c141

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

+3 −0
Original line number Diff line number Diff line
@@ -1147,6 +1147,9 @@ static void tmc_disable_etr_sink(struct coresight_device *csdev) 
		tmc_etr_byte_cntr_stop(drvdata->byte_cntr);

		coresight_cti_unmap_trigin(drvdata->cti_reset, 2, 0);

		coresight_cti_unmap_trigout(drvdata->cti_flush, 3, 0);

		/* Free memory outside the spinlock if need be */

		if (drvdata->etr_buf)

			tmc_etr_free_sysfs_buf(drvdata->etr_buf);

	}

	mutex_unlock(&drvdata->mem_lock);

	dev_info(drvdata->dev, "TMC-ETR disabled\n");