[alsa-devel] [PATCH] ALSA: hda: Comment about snd_hdac_bus_update_rirb() and spinlock

[Takashi Iwai]

The call of snd_hdac_bus_update_rirb() needs the bus->reg_lock
spinlock protection for concurrency.  Comment about it more
explicitly.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/hda/hdac_controller.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 01787081552d..b856184af37f 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -181,6 +181,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_bus_send_cmd);
  * @bus: HD-audio core bus
  *
  * Usually called from interrupt handler.
+ * The caller needs bus->reg_lock spinlock before calling this.
  */
 void snd_hdac_bus_update_rirb(struct hdac_bus *bus)
 {
-- 
2.16.4