diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index d28106e390c443d9f49b24e75a3da1ab3c3da821..49075f06f84658c6a1415761bba29f2607f0c583 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -79,7 +79,7 @@ module_param_array(vid, int, NULL, 0444); MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); module_param_array(pid, int, NULL, 0444); MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); -module_param(nrpacks, int, 0444); +module_param(nrpacks, int, 0644); MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB."); module_param(async_unlink, bool, 0444); MODULE_PARM_DESC(async_unlink, "Use async unlink mode."); @@ -920,9 +920,11 @@ static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_by else subs->curpacksize = maxsize; - if (is_playback) + if (is_playback) { urb_packs = nrpacks; - else + urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB); + urb_packs = min(urb_packs, (unsigned int)MAX_PACKS); + } else urb_packs = 1; if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) urb_packs = (urb_packs * 8) >> subs->datainterval;