[PATCH for v4.9 LTS 51/87] ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion

From: Ioan-Adrian Ratiu [ Upstream commit 13a6c8328e6056932dc680e447d4c5e8ad9add17 ] Testing EP_FLAG_RUNNING in snd_complete_urb() before running the completion logic allows us to save a few cpu cycles by returning early, skipping the pending urb in case the stream was stopped;

[PATCH for v4.9 LTS 51/87] ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion

From: Ioan-Adrian Ratiu [ Upstream commit 13a6c8328e6056932dc680e447d4c5e8ad9add17 ] Testing EP_FLAG_RUNNING in snd_complete_urb() before running the completion logic allows us to save a few cpu cycles by returning early, skipping the pending urb in case the stream was stopped; the stop logic