[alsa-devel] [PATCH v2 00/10] ALSA: usb-audio: fix playback/capture concurrent usage

Eldad Zack eldad at fogrefinery.com
Wed Aug 21 23:37:55 CEST 2013


This patch series attempts to fix a long starting problem with the concurrent
usage of playback and capture on implicit feedback devices.

Applies against current for-next (HEAD b43dd416be21bc8ad60984e13def032f01aaaa18 ).


Thanks to Clemens I was able to get rid of the get_interface workaround, so I
believe it's ready now, unless there's any other issues.

Other changes:
* Cleaned up and moved the set_param flag patch to #7.
* Fixed a NULL dereference in patch #8 for explicit feedback.
* Fixed a logic error in patch #9.
* Added patch #10.


Eldad Zack (10):
  ALSA: usb-audio: remove unused parameter from sync_ep_set_params
  ALSA: usb-audio: remove deactivate_endpoints()
  ALSA: usb-audio: prevent NULL dereference on stop trigger
  ALSA: usb-audio: don't deactivate URBs on in-use EP
  ALSA: usb-audio: void return type of snd_usb_endpoint_deactivate()
  ALSA: usb-audio: clear SUBSTREAM_FLAG_SYNC_EP_STARTED on error
  ALSA: usb-audio: correct ep use_count semantics (add set_param flag)
  ALSA: usb-audio: conditional interface altsetting
  ALSA: usb-audio: conditional concurrent usage of endpoint
  ALSA: usb-audio: remove altset_idx from snd_usb_substream

 sound/usb/card.h     |   2 +-
 sound/usb/endpoint.c |  76 +++++++++++++++++-------
 sound/usb/endpoint.h |  11 +++-
 sound/usb/pcm.c      | 161 ++++++++++++++++++++++++++++++++++++++-------------
 sound/usb/pcm.h      |   2 +
 sound/usb/proc.c     |   4 +-
 6 files changed, 192 insertions(+), 64 deletions(-)


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