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(-)
--
2.11.0
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