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[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 <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2005-08-12 15:18:00 +02:00 committed by Jaroslav Kysela
parent d6db392e92
commit 71d848ca00
1 changed files with 5 additions and 3 deletions
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8
sound/usb/usbaudio.c
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@ -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;