ALSA: usb-audio: Apply rate limit to warning messages in URB complete callback

retire_capture_urb() may print warning messages when the given URB
doesn't align, and this may flood the system log easily.
Put the rate limit to the message for avoiding it.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1093485
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index dc2dfec..20bed1c 100644 (file)
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1303,7 +1303,7 @@ static void retire_capture_urb(struct snd_usb_substream *subs,
                if (bytes % (runtime->sample_bits >> 3) != 0) {
                        int oldbytes = bytes;
                        bytes = frames * stride;
-                       dev_warn(&subs->dev->dev,
+                       dev_warn_ratelimited(&subs->dev->dev,
                                 "Corrected urb data len. %d->%d\n",
                                                        oldbytes, bytes);
                }