diff options
Diffstat (limited to 'sound/usb/endpoint.c')
| -rw-r--r-- | sound/usb/endpoint.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 49fb934ee432..4d733b2d8287 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -1234,7 +1234,7 @@ unlock: * * @ep: the endpoint to start * - * A call to this function will increment the use count of the endpoint. + * A call to this function will increment the running count of the endpoint. * In case it is not already running, the URBs for this endpoint will be * submitted. Otherwise, this function does nothing. * @@ -1253,11 +1253,12 @@ int snd_usb_endpoint_start(struct snd_usb_endpoint *ep) if (ep->sync_master) WRITE_ONCE(ep->sync_master->sync_slave, ep); - usb_audio_dbg(ep->chip, "Starting %s EP 0x%x (count %d)\n", - ep_type_name(ep->type), ep->ep_num, ep->use_count); + usb_audio_dbg(ep->chip, "Starting %s EP 0x%x (running %d)\n", + ep_type_name(ep->type), ep->ep_num, + atomic_read(&ep->running)); /* already running? */ - if (++ep->use_count != 1) + if (atomic_inc_return(&ep->running) != 1) return 0; /* just to be sure */ @@ -1319,7 +1320,7 @@ __error: if (ep->sync_master) WRITE_ONCE(ep->sync_master->sync_slave, NULL); clear_bit(EP_FLAG_RUNNING, &ep->flags); - ep->use_count--; + atomic_dec(&ep->running); deactivate_urbs(ep, false); return -EPIPE; } @@ -1329,7 +1330,7 @@ __error: * * @ep: the endpoint to stop (may be NULL) * - * A call to this function will decrement the use count of the endpoint. + * A call to this function will decrement the running count of the endpoint. * In case the last user has requested the endpoint stop, the URBs will * actually be deactivated. * @@ -1343,16 +1344,17 @@ void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep) if (!ep) return; - usb_audio_dbg(ep->chip, "Stopping %s EP 0x%x (count %d)\n", - ep_type_name(ep->type), ep->ep_num, ep->use_count); + usb_audio_dbg(ep->chip, "Stopping %s EP 0x%x (running %d)\n", + ep_type_name(ep->type), ep->ep_num, + atomic_read(&ep->running)); - if (snd_BUG_ON(ep->use_count == 0)) + if (snd_BUG_ON(!atomic_read(&ep->running))) return; if (ep->sync_master) WRITE_ONCE(ep->sync_master->sync_slave, NULL); - if (--ep->use_count == 0) { + if (!atomic_dec_return(&ep->running)) { deactivate_urbs(ep, false); set_bit(EP_FLAG_STOPPING, &ep->flags); } @@ -1363,7 +1365,7 @@ void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep) * * @ep: the endpoint to release * - * This function does not care for the endpoint's use count but will tear + * This function does not care for the endpoint's running count but will tear * down all the streaming URBs immediately. */ void snd_usb_endpoint_release(struct snd_usb_endpoint *ep) @@ -1410,7 +1412,7 @@ static void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep, * will take care of them later. */ if (snd_usb_endpoint_implicit_feedback_sink(ep) && - ep->use_count != 0) { + atomic_read(&ep->running)) { /* implicit feedback case */ int i, bytes = 0; |