From: Tingwei Zhang tingwei@codeaurora.org

Number of free masters is not set correctly in stm free path. Fix this by properly adding the number of output channels before setting them to 0 in stm_output_disclaim().

Currently it is equivalent to doing nothing since master->nr_free is incremented by 0.

Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for System Trace Module devices") Signed-off-by: Tingwei Zhang tingwei@codeaurora.org Signed-off-by: Sai Prakash Ranjan saiprakash.ranjan@codeaurora.org Cc: stable@vger.kernel.org # v4.4 Signed-off-by: Alexander Shishkin alexander.shishkin@linux.intel.com --- 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 c7ba8acfd4d5..5b5807cbcf7c 100644 --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -218,8 +218,8 @@ stm_output_disclaim(struct stm_device *stm, struct stm_output *output) bitmap_release_region(&master->chan_map[0], output->channel, ilog2(output->nr_chans));

- output->nr_chans = 0; master->nr_free += output->nr_chans; + output->nr_chans = 0; }

/*