stm class: Fix master deallocation in device unregistering

The device unregister path uses wrong master index range when it tries
to free the allocated masters, it should, as does the rest of the stm
class code, use real master IDs.

This patch fixes the device unregister path to use real master IDs to
avoid memory leaks after unloading the stm driver.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
[alexander.shishkin@intel.com: re-wrote the commit message]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index cdec240bd6b6db422ee2ea2fa51585b13dc476bf..79cca94bfb58f167cf264f7d11066d6b56813e81 100644 (file)
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -690,7 +690,7 @@ 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);