At Wed, 9 Mar 2011 07:53:09 -0800, Greg KH wrote:
On Wed, Mar 09, 2011 at 10:39:49AM -0500, Steven Rostedt wrote:
Not sure who to send this to, but last night on v2.6.38-rc8 ktest triggered this warning:
[ 32.062538] YM3812 and OPL-3 driver Copyright (C) by Hannu Savolainen, Rob Hooft 1993-1996 [ 32.071305] PM: Adding info for No Bus:timer [ 32.075864] PM: Adding info for platform:snd_dummy.0^M [ 32.081232] PM: Adding info for No Bus:card0 [ 32.085853] PM: Adding info for No Bus:pcmC0D0p [ 32.090650] PM: Adding info for No Bus:pcmC0D0c [ 32.095667] PM: Adding info for No Bus:dsp [ 32.099918] ------------[ cut here ]------------ [ 32.104531] WARNING: at /home/rostedt/work/autotest/nobackup/linux-test.git/fs/sysfs/dir.c:455 sysfs_add_one+0x83/0x95() [ 32.115379] Hardware name: [ 32.118859] sysfs: cannot create duplicate filename '/dev/char/14:4'
Two modules wanted to create the same minor number, that's not good.
14:4 is the OSS /dev/audio node.
Are they modules or built-in?
[ 32.125197] Modules linked in: [ 32.128255] Pid: 1, comm: swapper Not tainted 2.6.38-rc8-test #1 [ 32.134247] Call Trace:^M [ 32.136693] [<c044d095>] ? warn_slowpath_common+0x7c/0x91 [ 32.142168] [<c0552d35>] ? sysfs_add_one+0x83/0x95 [ 32.147036] [<c0552d35>] ? sysfs_add_one+0x83/0x95 [ 32.151904] [<c044d135>] ? warn_slowpath_fmt+0x33/0x35 [ 32.157120] [<c0552d35>] ? sysfs_add_one+0x83/0x95 [ 32.161989] [<c055393d>] ? sysfs_do_create_link+0xdf/0x181^M [ 32.167550] [<c073637f>] ? vsnprintf+0x22c/0x266 [ 32.172246] [<c0553a0f>] ? sysfs_create_link+0x17/0x1c [ 32.177462] [<c0950ce4>] ? device_add+0x183/0x573 [ 32.182245] [<c0958474>] ? device_pm_init+0x5d/0x61 [ 32.187200] [<c09510eb>] ? device_register+0x17/0x1a [ 32.192243] [<c0951165>] ? device_create_vargs+0x77/0x98 [ 32.197631] [<c09511b3>] ? device_create+0x2d/0x2f [ 32.202501] [<c0dc5caa>] ? sound_insert_unit+0x1ba/0x1d5 [ 32.207891] [<c0dc5e8e>] ? register_sound_special_device+0x103/0x11c [ 32.214319] [<c0dd7875>] ? snd_register_oss_device+0x10a/0x169 [ 32.220229] [<c0de6cd6>] ? register_oss_dsp+0x62/0xb5
Yup, sound subsystem...
Yep ;)
This was for a 386 build. I could give a .config and full dmesg if needed.
I think the sound developers (now on CC: would probably like to see that.)
I guess it's a long-standing issue. The dead old OSS driver creates /dev/audio and /dev/dspW by itself without coping with sound_core module.
Takashi