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stm class: Fix channel free in stm output free path

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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@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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tingwei Zhang 2019-04-17 10:35:34 +03:00 committed by Greg Kroah-Hartman
parent bd7df892bb
commit 9110fd8ba0
1 changed files with 1 additions and 1 deletions
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2
drivers/hwtracing/stm/core.c
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@ -226,8 +226,8 @@ 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;
}
/*