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| author |   Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2016-04-08 17:37:40 +0300 |
|---|---|---|
| committer | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2016-04-08 17:45:46 +0300 |
| commit | f152dfee19c0cd146b16179a60ffb2cacf995736 (patch) | |
| tree | 0d17a2e74c33e885f6a49ec167f58d647daa3ff0 /drivers/hwtracing/intel_th/msu.c | |
| parent | intel_th: msu: Set fops::owner to prevent module from unloading (diff) | |
| download | linux-dev-f152dfee19c0cd146b16179a60ffb2cacf995736.tar.xz linux-dev-f152dfee19c0cd146b16179a60ffb2cacf995736.zip | |
intel_th: msu: Release resources on removal
Do release the resources when msu subdevice gets removed: stop the
capture if it is active (which is still possible even though the
module in pinned) and free the capture buffers.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Laurent Fert <laurent.fert@intel.com>
Diffstat (limited to 'drivers/hwtracing/intel_th/msu.c')
| -rw-r--r-- | drivers/hwtracing/intel_th/msu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c index bcc3b4713377..0974090abc7d 100644 --- a/drivers/hwtracing/intel_th/msu.c +++ b/drivers/hwtracing/intel_th/msu.c @@ -1492,6 +1492,18 @@ static int intel_th_msc_probe(struct intel_th_device *thdev) static void intel_th_msc_remove(struct intel_th_device *thdev) { + struct msc *msc = dev_get_drvdata(&thdev->dev); + int ret; + + intel_th_msc_deactivate(thdev); + + /* + * Buffers should not be used at this point except if the + * output character device is still open and the parent + * device gets detached from its bus, which is a FIXME. + */ + ret = msc_buffer_free_unless_used(msc); + WARN_ON_ONCE(ret); } static struct intel_th_driver intel_th_msc_driver = { |