[alsa-devel] ASoC ac97: kobject warnings
Hi Mark,
the asoc generic ac97 codec support throws a warning on 2.6.29:
Advanced Linux Sound Architecture Driver Version 1.0.18a. No device for DAI WM8731 No device for DAI au1xpsc_i2s No device for DAI au1xpsc_ac97 AC97 SoC Audio Codec 0.6 asoc: AC97 HiFi <-> au1xpsc_ac97 mapping ok kobject (8f9279ec): tried to init an initialized object, something is seriously wrong. Call Trace: [<80106bcc>] dump_stack+0x8/0x34 [<8022c680>] kobject_init+0x50/0xcc [<8026d914>] device_initialize+0x2c/0x9c [<8026e274>] device_register+0x14/0x28 [<802ff2b8>] snd_soc_init_card+0x18c/0x24c [<803024a4>] ac97_soc_probe+0x12c/0x178 [<802fe76c>] snd_soc_instantiate_cards+0x1d4/0x2f4 [<802fe8fc>] soc_probe+0x70/0xb8 [<8027044c>] driver_probe_device+0xe0/0x1b8 [<8026f884>] bus_for_each_drv+0x60/0xb0 [<80270670>] device_attach+0x60/0x88 [<8026f63c>] bus_attach_device+0x38/0x94 [<8026e0cc>] device_add+0x390/0x524 [<80271a90>] platform_device_add+0x14c/0x1bc [<80462bd4>] db1200_audio_load+0xd8/0x10c [<801090e0>] __kprobes_text_end+0x60/0x1c8 [<804532d0>] kernel_init+0x9c/0x108 [<8010cf90>] kernel_thread_helper+0x10/0x18
ALSA device list: #0: DB1200 AC97 Audio (AC97)
The asoc machine code is very similar to sound/soc/au1x/sample-ac97.c (full source here: http://mlau.at/db1200.c).
I didn't bisect it; however it started after the first ASoC patches went in mainline after 2.6.28's release.
Please have a look!
Thanks, Manuel Lauss
On Thu, Feb 12, 2009 at 07:37:56PM +0000, Mark Brown wrote:
On Thu, Feb 12, 2009 at 06:05:05PM +0100, Manuel Lauss wrote:
the asoc generic ac97 codec support throws a warning on 2.6.29:
Please try this patch, it fixes the problem for me here:
From 809e4472590e2312d3bea70b4327c3b65676b1a6 Mon Sep 17 00:00:00 2001 From: Mark Brown broonie@opensource.wolfsonmicro.com Date: Thu, 12 Feb 2009 19:33:19 +0000 Subject: [PATCH] ASoC: Only register AC97 bus if it's not done already
ASoC supports both explicit codec drivers for AC97 devices and a simple driver which uses the standard ALSA AC97 framework for codec support. When used with the generic AC97 codec support that will provide the ad hoc AC97 device for drivers like touchscreens to attach to so the core shouldn't do so.
[...]
Yes it's fixed here too.
Thanks, Manuel Lauss
participants (2)
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Manuel Lauss -
Mark Brown