1 files changed, 3 insertions, 0 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index b6d886373bb..8ebc1adb5ed 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1878,6 +1878,9 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
         }
 
         /* set the period time minimum 1ms */
+        /* FIXME: high-speed mode allows 125us minimum period, but many parts
+         * in the current code assume the 1ms period.
+         */
         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
                                      1000 * MIN_PACKS_URB,
                                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);