When the loglevel is greater than 4, with a long messages printed on the console while playing or recording audios, the usb controller may become abnormal. `usb 1-2: timeout: still 1 active urbs on EP #1` Fix it by configuring the transfer_flags URB_ISO_ASAP flag. Signed-off-by: Michael Wu <michael@xxxxxxxxxxxxxxxxx> --- sound/usb/endpoint.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 310cd6fb0038..df9a91c2fc7d 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -1245,7 +1245,7 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep) if (!u->urb->transfer_buffer) goto out_of_memory; u->urb->pipe = ep->pipe; - u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; u->urb->interval = 1 << ep->datainterval; u->urb->context = u; u->urb->complete = snd_complete_urb; @@ -1288,7 +1288,7 @@ static int sync_ep_set_params(struct snd_usb_endpoint *ep) u->urb->transfer_dma = ep->sync_dma + i * 4; u->urb->transfer_buffer_length = 4; u->urb->pipe = ep->pipe; - u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; u->urb->number_of_packets = 1; u->urb->interval = 1 << ep->syncinterval; u->urb->context = u; -- 2.29.0
