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_<level>_ratelimited to printk_ratelimit
+ if (printk_ratelimit() &&
Cc: Jaroslav Kysela <pe...@perex.cz>
Cc: Takashi Iwai <ti...@suse.de>
Cc: Eldad Zack <el...@fogrefinery.com>
Cc: Daniel Mack <zon...@gmail.com>
Cc: Clemens Ladisch <clem...@ladisch.de>
Signed-off-by: Tim Gardner <tim.gard...@canonical.com>
---
sound/usb/pcm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 49de5c1..131336d 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1501,7 +1501,8 @@ 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)
dev_dbg(&subs->dev->dev,
"delay: estimated %d, actual %d\n",
est_delay, subs->last_delay);
--
1.7.9.5
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