When gb_audio_apbridgea_register_cport failed, maybe:
1) gb_pm_runtime_get_sync failed, usage counter remained unchanged;
2) gb_hd_output failed, usage counter remained increased;
In error state, there are two different states in usage cpounter. So, if gb_hd_output failed, we should call gb_pm_runtime_put_autosuspend ot decrease usage counter for balabce preventing reference leak. And we fixed it by add gb_pm_runtime_put_autosuspend when gb_hd_output failed.
Fixes: 6ba7fad430d63 ("Add runtime pm support to audio protocol device class driver.") Signed-off-by: Zhang Qilong zhangqilong3@huawei.com --- drivers/staging/greybus/audio_apbridgea.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/greybus/audio_apbridgea.c b/drivers/staging/greybus/audio_apbridgea.c index 26117e390deb..50545fd9756c 100644 --- a/drivers/staging/greybus/audio_apbridgea.c +++ b/drivers/staging/greybus/audio_apbridgea.c @@ -42,8 +42,12 @@ int gb_audio_apbridgea_register_cport(struct gb_connection *connection, if (ret) return ret;
- return gb_hd_output(connection->hd, &req, sizeof(req), + ret = gb_hd_output(connection->hd, &req, sizeof(req), GB_APB_REQUEST_AUDIO_CONTROL, true); + if (ret) + gb_pm_runtime_put_autosuspend(connection->bundle); + + return ret; } EXPORT_SYMBOL_GPL(gb_audio_apbridgea_register_cport);