From 71d848ca00a16179b17e58e5f51c2d9a6c4f97a2 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Fri, 12 Aug 2005 15:18:00 +0200 Subject: [PATCH] [ALSA] usb-audio: make nrpacks parameter writeable USB generic driver The nrpacks module parameter is used only when initializing a playback stream, so it doesn't hurt to make it writeable. Signed-off-by: Clemens Ladisch --- sound/usb/usbaudio.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index d28106e390c..49075f06f84 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; -- 2.41.1