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path: root/drivers/hwtracing
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-rw-r--r--drivers/hwtracing/coresight/coresight-etm3x.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index fd5c4cca7db5..6f30d52da9e4 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -363,15 +363,16 @@ static int etm_enable_hw(struct etm_drvdata *drvdata)
CS_UNLOCK(drvdata->base);
+ rc = coresight_claim_device_unlocked(drvdata->base);
+ if (rc)
+ goto done;
+
/* Turn engine on */
etm_clr_pwrdwn(drvdata);
/* Apply power to trace registers */
etm_set_pwrup(drvdata);
/* Make sure all registers are accessible */
etm_os_unlock(drvdata);
- rc = coresight_claim_device_unlocked(drvdata->base);
- if (rc)
- goto done;
etm_set_prog(drvdata);
@@ -422,8 +423,6 @@ static int etm_enable_hw(struct etm_drvdata *drvdata)
etm_clr_prog(drvdata);
done:
- if (rc)
- etm_set_pwrdwn(drvdata);
CS_LOCK(drvdata->base);
dev_dbg(drvdata->dev, "cpu: %d enable smp call done: %d\n",
@@ -577,9 +576,9 @@ static void etm_disable_hw(void *info)
for (i = 0; i < drvdata->nr_cntr; i++)
config->cntr_val[i] = etm_readl(drvdata, ETMCNTVRn(i));
+ etm_set_pwrdwn(drvdata);
coresight_disclaim_device_unlocked(drvdata->base);
- etm_set_pwrdwn(drvdata);
CS_LOCK(drvdata->base);
dev_dbg(drvdata->dev, "cpu: %d disable smp call done\n", drvdata->cpu);