ALSA: usb-audio - Fix types taken in min()

Fix the compile warning due to different integer types used in min():
  sound/usb/usbaudio.c: In function 'init_substream_urbs':
  sound/usb/usbaudio.c:1087: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index fa3f7a1dc5e1..5149c5893eaa 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1084,7 +1084,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
                 urb_packs = 1;
         urb_packs *= packs_per_ms;
         if (subs->syncpipe)
-                urb_packs = min(urb_packs, 1 << subs->syncinterval);
+                urb_packs = min(urb_packs, 1U << subs->syncinterval);
 
         /* decide how many packets to be used */
         if (is_playback) {