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usb: gadget: uac: stop sending audio when disconnect

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The sending process may still work if disconnect from
PC, for the sending function is called in the complete
call back function. So set alt to 0 when disconnect or
reset, and stop follow-up sending in complete function
if alt is 0.

Change-Id: I073f122fe2ce2faf8cf6fb036fb983f9f3325f34
Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
This commit is contained in:
Meng Dongyang
2018-06-11 15:09:26 +08:00
committed by Tao Huang
parent d04e0d982b
commit cfb692c0ad
1 changed files with 10 additions and 4 deletions
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14
drivers/usb/gadget/function/f_audio_source.c
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@@ -674,7 +674,8 @@ static void audio_data_complete(struct usb_ep *ep, struct usb_request *req)
snd_pcm_period_elapsed(audio->substream);
audio->period_offset = 0;
}
audio_send(audio);
if (audio->alt)
audio_send(audio);
}
static int audio_set_endpoint_req(struct usb_function *f,
@@ -913,6 +914,9 @@ static void audio_disable(struct usb_function *f)
{
struct audio_dev *audio = func_to_audio(f);
audio->alt = 0;
schedule_work(&audio->work);
pr_debug("audio_disable\n");
usb_ep_disable(audio->in_ep);
}
@@ -1064,9 +1068,11 @@ audio_unbind(struct usb_configuration *c, struct usb_function *f)
static void audio_pcm_playback_start(struct audio_dev *audio)
{
audio->start_time = ktime_get();
audio->frames_sent = 0;
audio_send(audio);
if (audio->alt) {
audio->start_time = ktime_get();
audio->frames_sent = 0;
audio_send(audio);
}
}
static void audio_pcm_playback_stop(struct audio_dev *audio)