diff options
Diffstat (limited to 'sound/usb/endpoint.c')
| -rw-r--r-- | sound/usb/endpoint.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 8f65349a06d3..7b01e7b4e335 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -403,10 +403,15 @@ static int prepare_inbound_urb(struct snd_usb_endpoint *ep, static void notify_xrun(struct snd_usb_endpoint *ep) { struct snd_usb_substream *data_subs; + struct snd_pcm_substream *psubs; data_subs = READ_ONCE(ep->data_subs); - if (data_subs && data_subs->pcm_substream) - snd_pcm_stop_xrun(data_subs->pcm_substream); + if (!data_subs) + return; + psubs = data_subs->pcm_substream; + if (psubs && psubs->runtime && + psubs->runtime->state == SNDRV_PCM_STATE_RUNNING) + snd_pcm_stop_xrun(psubs); } static struct snd_usb_packet_info * @@ -562,7 +567,10 @@ static void snd_complete_urb(struct urb *urb) push_back_to_ready_list(ep, ctx); clear_bit(ctx->index, &ep->active_mask); snd_usb_queue_pending_output_urbs(ep, false); - atomic_dec(&ep->submitted_urbs); /* decrement at last */ + /* decrement at last, and check xrun */ + if (atomic_dec_and_test(&ep->submitted_urbs) && + !snd_usb_endpoint_implicit_feedback_sink(ep)) + notify_xrun(ep); return; } @@ -918,14 +926,24 @@ static int endpoint_set_interface(struct snd_usb_audio *chip, { int altset = set ? ep->altsetting : 0; int err; + int retries = 0; + const int max_retries = 5; if (ep->iface_ref->altset == altset) return 0; + /* already disconnected? */ + if (unlikely(atomic_read(&chip->shutdown))) + return -ENODEV; usb_audio_dbg(chip, "Setting usb interface %d:%d for EP 0x%x\n", ep->iface, altset, ep->ep_num); +retry: err = usb_set_interface(chip->dev, ep->iface, altset); if (err < 0) { + if (err == -EPROTO && ++retries <= max_retries) { + msleep(5 * (1 << (retries - 1))); + goto retry; + } usb_audio_err_ratelimited( chip, "%d:%d: usb_set_interface failed (%d)\n", ep->iface, altset, err); @@ -1513,6 +1531,7 @@ unlock: mutex_unlock(&chip->mutex); return err; } +EXPORT_SYMBOL_GPL(snd_usb_endpoint_prepare); /* get the current rate set to the given clock by any endpoint */ int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock) |