From 24ec54eece1d7c71dbbb5e7c6831566d98135348 Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Wed, 9 Apr 2014 11:30:44 -0600 Subject: ALSA: usb-audio: Suppress repetitive debug messages from retire_playback_urb() commit a5065eb6da55b226661456e6a7435f605df98111 upstream. BugLink: http://bugs.launchpad.net/bugs/1305133 Malfunctioning or slow devices can cause a flood of dmesg SPAM. I've ignored checkpatch.pl complaints about the use of printk_ratelimit() in favour of prior art in sound/usb/pcm.c. WARNING: Prefer printk_ratelimited or pr__ratelimited to printk_ratelimit + if (printk_ratelimit() && Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Eldad Zack Cc: Daniel Mack Cc: Clemens Ladisch Signed-off-by: Tim Gardner Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/pcm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'sound') diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 93b6e32cfead..be6dfd4bbdbb 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -1419,7 +1419,8 @@ static void retire_playback_urb(struct snd_usb_substream *subs, * The error should be lower than 2ms since the estimate relies * on two reads of a counter updated every ms. */ - if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2) + if (printk_ratelimit() && + abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2) snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n", est_delay, subs->last_delay); -- cgit v1.2.3