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Commit 71d848ca authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela
Browse files

[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: default avatarClemens Ladisch <clemens@ladisch.de>
parent d6db392e

sound/usb/usbaudio.c

+5 −3
Original line number Diff line number Diff line
@@ -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;