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authorSander Eikelenboom <linux@eikelenboom.it>2014-05-02 17:09:27 +0400
committerTakashi Iwai <tiwai@suse.de>2014-05-02 20:10:59 +0400
commitb7a7723513dc89f83d6df13206df55d4dc26e825 (patch)
treeb6bd078b48eca758948b2885a1eff234fa9fbf8d
parent91943954e353fa56cc52a8e97346205afb9823ab (diff)
downloadlinux-b7a7723513dc89f83d6df13206df55d4dc26e825.tar.xz
ALSA: usb-audio: Prevent printk ratelimiting from spamming kernel log while DEBUG not defined
This (widely used) construction: if(printk_ratelimit()) dev_dbg() Causes the ratelimiting to spam the kernel log with the "callbacks suppressed" message below, even while the dev_dbg it is supposed to rate limit wouldn't print anything because DEBUG is not defined for this device. [ 533.803964] retire_playback_urb: 852 callbacks suppressed [ 538.807930] retire_playback_urb: 852 callbacks suppressed [ 543.811897] retire_playback_urb: 852 callbacks suppressed [ 548.815745] retire_playback_urb: 852 callbacks suppressed [ 553.819826] retire_playback_urb: 852 callbacks suppressed So use dev_dbg_ratelimited() instead of this construction. Signed-off-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/usb/pcm.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 131336d40492..c62a1659106d 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1501,9 +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 (printk_ratelimit() &&
- abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
- dev_dbg(&subs->dev->dev,
+ if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
+ dev_dbg_ratelimited(&subs->dev->dev,
"delay: estimated %d, actual %d\n",
est_delay, subs->last_delay);