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| author | Sander Eikelenboom <linux@eikelenboom.it> | 2014-05-02 15:09:27 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-05-02 18:10:59 +0200 |
| commit | b7a7723513dc89f83d6df13206df55d4dc26e825 (patch) | |
| tree | b6bd078b48eca758948b2885a1eff234fa9fbf8d | |
| parent | 91943954e353fa56cc52a8e97346205afb9823ab (diff) | |
| download | linux-stable-b7a7723513dc89f83d6df13206df55d4dc26e825.tar.gz linux-stable-b7a7723513dc89f83d6df13206df55d4dc26e825.tar.bz2 linux-stable-b7a7723513dc89f83d6df13206df55d4dc26e825.zip | |
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.c | 5 |
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); |