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ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion
authorIoan-Adrian Ratiu <adi@adirat.com>
Wed, 4 Jan 2017 22:37:47 +0000 (00:37 +0200)
committerTakashi Iwai <tiwai@suse.de>
Thu, 5 Jan 2017 06:35:17 +0000 (07:35 +0100)
commit618bbec8ee87d151a2acaca118a7f874bf902585
tree1678baeaa0a21ef8ecc188c84533276165fb82bdtree | snapshot
parentf1743f5f226aca9783ea2f5f0dcfc1650dbae97bcommit | diff
ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion

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 handles the urb
and sets the completion callbacks to NULL.

Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/endpoint.c diff | blob | history
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