[PATCH v2 0/2] ALSA: Fix usb-audio races

[Ioan-Adrian Ratiu <adi@adirat.com>]

Many thanks to Takashi Iwai & Sakamoto for their awesome feedback.

Changes since v1:
    * Rebased my fix on top of tiwai's revert and integrated the changes
    from the original fix into this.
    * Dropped the stop_endpoints() call inside snd_usb_pcm_prepare() and
    kept the previously existing snd_usb_endpoint_sync_pending_stop() call.
    * Retained the deactivate_urbs() call in snd_usb_pcm_prepare(), I only
    removed the can_sleep logic.
    * Split the EP_FLAG_RUNNING check in a separate commit to keep the log
    clean since this is not part of the race fix.

Ioan-Adrian Ratiu (2):
  ALSA: usb-audio: Fix irq/process data synchronization
  ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion

 sound/usb/endpoint.c | 20 ++++++++++----------
 sound/usb/endpoint.h |  2 +-
 sound/usb/pcm.c      | 10 +++++-----
 3 files changed, 16 insertions(+), 16 deletions(-)

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2.11.0