diff options
Diffstat (limited to 'sound/firewire/motu/motu-register-dsp-message-parser.c')
| -rw-r--r-- | sound/firewire/motu/motu-register-dsp-message-parser.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sound/firewire/motu/motu-register-dsp-message-parser.c b/sound/firewire/motu/motu-register-dsp-message-parser.c index efb9708b5b5f..fe804615294c 100644 --- a/sound/firewire/motu/motu-register-dsp-message-parser.c +++ b/sound/firewire/motu/motu-register-dsp-message-parser.c @@ -79,6 +79,7 @@ enum register_dsp_msg_type { }; struct msg_parser { + spinlock_t lock; struct snd_firewire_motu_register_dsp_meter meter; bool meter_pos_quirk; }; @@ -89,6 +90,7 @@ int snd_motu_register_dsp_message_parser_new(struct snd_motu *motu) parser = devm_kzalloc(&motu->card->card_dev, sizeof(*parser), GFP_KERNEL); if (!parser) return -ENOMEM; + spin_lock_init(&parser->lock); if (motu->spec == &snd_motu_spec_4pre || motu->spec == &snd_motu_spec_audio_express) parser->meter_pos_quirk = true; motu->message_parser = parser; @@ -105,8 +107,11 @@ void snd_motu_register_dsp_message_parser_parse(struct snd_motu *motu, const str { struct msg_parser *parser = motu->message_parser; bool meter_pos_quirk = parser->meter_pos_quirk; + unsigned long flags; int i; + spin_lock_irqsave(&parser->lock, flags); + for (i = 0; i < desc_count; ++i) { const struct pkt_desc *desc = descs + i; __be32 *buffer = desc->ctx_payload; @@ -142,4 +147,17 @@ void snd_motu_register_dsp_message_parser_parse(struct snd_motu *motu, const str } } } + + spin_unlock_irqrestore(&parser->lock, flags); +} + +void snd_motu_register_dsp_message_parser_copy_meter(struct snd_motu *motu, + struct snd_firewire_motu_register_dsp_meter *meter) +{ + struct msg_parser *parser = motu->message_parser; + unsigned long flags; + + spin_lock_irqsave(&parser->lock, flags); + memcpy(meter, &parser->meter, sizeof(*meter)); + spin_unlock_irqrestore(&parser->lock, flags); } |