tree 5dd195f2e30f6dbc225b97c03cc52d49a31033b7
parent d6db392e9235c48bb945624798e9beede7b85b12
author Clemens Ladisch <[EMAIL PROTECTED]> Fri, 12 Aug 2005 15:18:00 +0200
committer Jaroslav Kysela <[EMAIL PROTECTED]> Tue, 30 Aug 2005 08:45:14 +0200
[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 <[EMAIL PROTECTED]>
sound/usb/usbaudio.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
--- 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_s
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;
-
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