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| author | Takashi Iwai <tiwai@suse.de> | 2018-07-29 22:38:54 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-07-29 22:39:29 +0200 |
| commit | 16c796e8fac353d736055322ca6a38ba3c49f5e2 (patch) | |
| tree | a8557b6c660d067834ece2421a1d6ffe990b60af /sound/core/seq/seq_virmidi.c | |
| parent | f69548ffafcc4942022f16f2f192b24143de1dba (diff) | |
| parent | f59cf9a0551dd954ad8b752461cf19d9789f4b1d (diff) | |
Merge branch 'for-linus' into topic/virmidi
Pull the latest ALSA sequencer fixes for the further development of
virmidi.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/seq/seq_virmidi.c')
| -rw-r--r-- | sound/core/seq/seq_virmidi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c index 289ae6bb81d9..8ebbca554e99 100644 --- a/sound/core/seq/seq_virmidi.c +++ b/sound/core/seq/seq_virmidi.c @@ -163,6 +163,7 @@ static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int count, res; unsigned char buf[32], *pbuf; unsigned long flags; + bool check_resched = !in_atomic(); if (up) { vmidi->trigger = 1; @@ -200,6 +201,15 @@ static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, vmidi->event.type = SNDRV_SEQ_EVENT_NONE; } } + if (!check_resched) + continue; + /* do temporary unlock & cond_resched() for avoiding + * CPU soft lockup, which may happen via a write from + * a huge rawmidi buffer + */ + spin_unlock_irqrestore(&substream->runtime->lock, flags); + cond_resched(); + spin_lock_irqsave(&substream->runtime->lock, flags); } out: spin_unlock_irqrestore(&substream->runtime->lock, flags); |