[PATCH] drivers: stm: correct the index in master array release

[Chunyan Zhang]

It would be broken if stm_data->sw_start isn't zero, because that
stp_master_free() get the 'master' with __stm_master()/stm_master(),
in which the masterID is the second input parameter minus
stm_data->sw_start. So freeing STM masters has to start from
stm_data->sw_start.

Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx>
---
 drivers/hwtracing/stm/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index da53b5d..80e7b5e 100644
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -718,7 +718,7 @@ void stm_unregister_device(struct stm_data *stm_data)
 		stp_policy_unbind(stm->policy);
 	mutex_unlock(&stm->policy_mutex);
 
-	for (i = 0; i < stm->sw_nmasters; i++)
+	for (i = stm->data->sw_start; i <= stm->data->sw_end; i++)
 		stp_master_free(stm, i);
 
 	device_unregister(&stm->dev);
-- 
1.9.1