• Sander Eikelenboom's avatar
    ALSA: usb-audio: Prevent printk ratelimiting from spamming kernel log while DEBUG not defined · b7a77235
    Sander Eikelenboom authored
    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: default avatarSander Eikelenboom <linux@eikelenboom.it>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    b7a77235
pcm.c 44.8 KB