From: Tingwei Zhang <tingwei@xxxxxxxxxxxxxx>
commit ee496da4c3915de3232b5f5cd20e21ae3e46fe8d upstream.
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@xxxxxxxxxxxxxx>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.4
Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwtracing/stm/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -226,8 +226,8 @@ stm_output_disclaim(struct stm_device *s
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;
}
/*
