Return-Path: <linux-kernel-owner+w=401wt.eu-S1753775Ab0ALI5i@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753775Ab0ALI5i (ORCPT <rfc822;w@1wt.eu>);
	Tue, 12 Jan 2010 03:57:38 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753649Ab0ALI5h
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Tue, 12 Jan 2010 03:57:37 -0500
Received: from cantor.suse.de ([195.135.220.2]:56057 "EHLO mx1.suse.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751036Ab0ALI5h (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 12 Jan 2010 03:57:37 -0500
Date: Tue, 12 Jan 2010 09:57:36 +0100
Message-ID: <s5hzl4j66pr.wl%tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: John Kacur <jkacur@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>, Jaroslav Kysela <perex@perex.cz>,
       alsa-devel@alsa-project.org
Subject: Re: WARNING: at sound/core/sound_oss.c:96 snd_oss_kernel_minor+0xdf/0x120 	[snd]()
In-Reply-To: <520f0cf11001060853i5c296744rf94c947cb7798774@mail.gmail.com>
References: <520f0cf11001060853i5c296744rf94c947cb7798774@mail.gmail.com>
User-Agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka)
 FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.7 Emacs/23.1
 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka")
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2791
Lines: 60

At Wed, 6 Jan 2010 17:53:24 +0100,
John Kacur wrote:
> 
> The following was in my 2.6.33-rc3 dmesg (of course that doesn't mean
> that the problem didn't exist earlier too)
> 
> WARNING: at /home/jkacur/rt.linux.git/sound/core/sound_oss.c:96
> snd_oss_kernel_minor+0xdf/0x120 [snd]()
> Hardware name: 2241B48
> BUG? (minor < 0 || minor >= 128)
> Modules linked in: snd_mixer_oss thinkpad_acpi(+) sdhci hwmon i2c_i801
> firewire_ohci snd_pcm mmc_core snd_timer cfg80211 firewire_core btusb
> joydev iTCO_wdt bluetooth ata_generic e1000e i2c_core ppdev snd
> battery ac iTCO_vendor_support parport_pc ricoh_mmc intel_agp
> pata_acpi pcspkr parport tpm_tis video wmi output soundcore button tpm
> rfkill sr_mod tpm_bios snd_page_alloc crc_itu_t cdrom sg ahci libata
> sd_mod scsi_mod crc_t10dif xfs exportfs uhci_hcd ohci_hcd ehci_hcd
> [last unloaded: scsi_wait_scan]
> Pid: 1317, comm: modprobe Not tainted 2.6.33-rc3 #1
> Call Trace:
>  [<ffffffffa027bb25>] ? snd_oss_kernel_minor+0xdf/0x120 [snd]
>  [<ffffffff8104338c>] warn_slowpath_common+0x7c/0xa9
>  [<ffffffff81043410>] warn_slowpath_fmt+0x41/0x43
>  [<ffffffffa027bb25>] snd_oss_kernel_minor+0xdf/0x120 [snd]
>  [<ffffffffa027bc7e>] snd_register_oss_device+0x2c/0x21a [snd]
>  [<ffffffffa0271e1e>] snd_mixer_oss_notify_handler+0xa5/0x2e5 [snd_mixer_oss]
>  [<ffffffff81375e00>] ? __mutex_unlock_slowpath+0x5c/0x141
>  [<ffffffff810710d5>] ? trace_hardirqs_on_caller+0x11f/0x14a
>  [<ffffffff8107110d>] ? trace_hardirqs_on+0xd/0xf
> sdhci-pci 0000:15:00.2: SDHCI controller found [1180:0822] (rev 21)
> sdhci-pci 0000:15:00.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18
>  [<ffffffff81375ed3>] ? __mutex_unlock_slowpath+0x12f/0x141
> sdhci-pci 0000:15:00.2: Will use DMA mode even though HW doesn't fully
> claim to support it.
> Registered led device: mmc0::
> mmc0: SDHCI controller on PCI [0000:15:00.2] using DMA
>  [<ffffffffa027628a>] snd_card_register+0x135/0x14b [snd]
>  [<ffffffffa0370c88>] volume_init+0x335/0x3d2 [thinkpad_acpi]
>  [<ffffffffa037289b>] thinkpad_acpi_module_init+0x61f/0xa4f [thinkpad_acpi]
>  [<ffffffffa037227c>] ? thinkpad_acpi_module_init+0x0/0xa4f [thinkpad_acpi]
>  [<ffffffff810001fa>] do_one_initcall+0x5f/0x154
>  [<ffffffff8107ff34>] sys_init_module+0xd7/0x234
>  [<ffffffff81002d5b>] system_call_fastpath+0x16/0x1b
> ---[ end trace a6d53dc318f09cb5 ]---

Looks like the code path from thinkpad-acpi...

Could you add some printk's in sound/core/sound_oss.c:snd_oss_kernel_minor()
to inspect which values are taken and calculated?


thanks,

Takashi

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/