On 08/14/15 22:25, Mark Brown wrote:
On Tue, May 26, 2015 at 09:59:07PM +0300, Jyri Sarha wrote:
+
+ mutex_lock(&hcp->current_stream_lock);
+ if (hcp->current_stream && hcp->current_stream->runtime &&
+ snd_pcm_running(hcp->current_stream)) {
+ dev_info(dev, "HDMI audio playback aborted\n");
Does this really need to be dev_info()?
No, I'll change that to debug level.
+ if (hcp->hcd.ops->get_eld) {
+ hcp->eld = hcp->hcd.ops->get_eld(hcp->hcd.dev);
+
+ /* Call snd_pcm_hw_constraint_eld here */
+ }
...
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ mutex_lock(&hcp->current_stream_lock);
+ BUG_ON(hcp->current_stream != substream);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+
+ hcp->hcd.ops->audio_shutdown(hcp->hcd.dev);
Shouldn't the callback be in or before the lock? Otherwise we could
potentially race with starting a new stream.
Yes, it should be before it. I'll fix that.
If it is inside, there is a "possible deadlock" warning (atleast in the
similar place in omap-hdmi-audio there was) if those warnings are turned
on and there is another lock that is taken in the video side callbacks.
Thanks,
Jyri
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