From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 16 May 2018 18:07:18 +0000 (+0200)
Subject: ALSA: usb-audio: Apply rate limit to warning messages in URB complete callback
X-Git-Tag: v4.9.117~63
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=03df65a0bc5e15e7c4cc7463cccfd86bc3c01a66;p=platform%2Fkernel%2Flinux-amlogic.git

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

[ Upstream commit 377a879d9832f4ba69bd6a1fc996bb4181b1e504 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index c5dfe82beb24..e6ac7b9b4648 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1310,7 +1310,7 @@ 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);
 		}