Message-ID: <m11urffgja.fsf@fess.ebiederm.org>
Date:	Wed, 04 Jan 2012 10:50:49 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Numan DEMİRDÖĞEN <numand46@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: sdhci causing WARNING: at fs/sysfs/dir.c:455 sysfs_add_one+0x9b/0xd0()

Numan DEMİRDÖĞEN <numand46@...il.com> writes:

> I have been getting this message since I started to use 3.0 series'
> kernels. I found this (https://lkml.org/lkml/2011/5/4/516) topic
> related to this warning.

Hopefully I have added some relevant Cc's.  The sdhci driver attempting
to abuse sysfs and sysfs is refusing to put up with it.

Can someone who understands the sdhci driver take a look at this?

Eric



> Best regards,
>   Numan.
> ---
> ver_linux output:
>
> Linux arch 3.1.6-1-ARCH #1 SMP PREEMPT Thu Dec 22 08:52:33 UTC 2011
> i686 Intel(R) Pentium(R) M processor 1.73GHz GenuineIntel GNU/Linux
> Gnu C                  4.6.2
> Gnu make               3.82
> binutils               Binutils
> util-linux             fdformat
> mount                  support
> module-init-tools      3.16
> e2fsprogs              1.41.14
> xfsprogs               3.1.7
> Linux C Library        > libc.2.15
> Dynamic linker (ldd)   2.15
> Linux C++ Library      6.0.16
> Procps                 3.2.8
> Kbd                    1.15.3
> Sh-utils               8.14
> Modules Loaded         michael_mic arc4 ecb lib80211_crypt_tkip pcmcia
> radeon ttm sdhci_pci sdhci firewire_ohci firewire_core ipw2200 libipw
> yenta_socket cfg80211 iTCO_wdt r8169 intel_agp snd_hda_codec_si3054
> rfkill pcmcia_rsrc snd_hda_codec_analog psmouse pcmcia_core mmc_core
> intel_gtt i2c_i801 mii iTCO_vendor_support crc_itu_t drm_kms_helper
> evdev lib80211 battery ac video snd_hda_intel snd_hda_codec drm
> snd_hwdep snd_pcm agpgart tifm_7xx1 tifm_core i2c_algo_bit i2c_core
> snd_timer snd soundcore snd_page_alloc thermal button cpufreq_ondemand
> acpi_cpufreq freq_table processor mperf ext4 mbcache jbd2 crc16 usbhid
> hid sr_mod cdrom sd_mod pata_acpi uhci_hcd ahci libahci ata_piix
> libata ehci_hcd scsi_mod usbcore
>
> dmesg excerpt:
>
> sdhci-pci 0000:06:09.4: SDHCI controller found [104c:8034] (rev 0)
> sdhci-pci 0000:06:09.4: PCI INT A -> GSI 22 (level, low) -> IRQ 22
>  _regulator_get: 0000:06:09.4 supply vmmc not found, using dummy regulator
> Registered led device: mmc0::
> mmc0: SDHCI controller on PCI [0000:06:09.4] using PIO
> _regulator_get: 0000:06:09.4 supply vmmc not found, using dummy regulator
> ------------[ cut here ]------------
> WARNING: at fs/sysfs/dir.c:455 sysfs_add_one+0x9b/0xd0()
> Hardware name: AMILO Pro V2045
> sysfs: cannot create duplicate filename
> '/devices/pci0000:00/0000:00:1e.0/0000:06:09.4/microamps_requested_0000:06:09.4-vmmc'
> Modules linked in: pcmcia radeon ttm sdhci_pci(+) sdhci firewire_ohci
> firewire_core ipw2200 libipw yenta_socket cfg80211 iTCO_wdt r8169
> intel_agp snd_hda_codec_si3054 rfkill pcmcia_rsrc snd_hda_codec_analog
> psmouse pcmcia_core mmc_core intel_gtt i2c_i801 mii
> iTCO_vendor_support crc_itu_t drm_kms_helper evdev lib80211 battery ac
> video snd_hda_intel snd_hda_codec drm snd_hwdep snd_pcm agpgart
> tifm_7xx1 tifm_core i2c_algo_bit i2c_core snd_timer snd soundcore
> snd_page_alloc thermal button cpufreq_ondemand acpi_cpufreq freq_table
> processor mperf ext4 mbcache jbd2 crc16 usbhid hid sr_mod cdrom sd_mod
> pata_acpi uhci_hcd ahci libahci ata_piix libata ehci_hcd scsi_mod
> usbcore
> Pid: 315, comm: modprobe Not tainted 3.1.6-1-ARCH #1
> Call Trace:
> [<c0147182>] warn_slowpath_common+0x72/0xa0
> [<c02780db>] ? sysfs_add_one+0x9b/0xd0
> [<c02780db>] ? sysfs_add_one+0x9b/0xd0
> [<c0147253>] warn_slowpath_fmt+0x33/0x40
> [<c02780db>] sysfs_add_one+0x9b/0xd0
> [<c02773c9>] sysfs_add_file_mode+0x49/0x90
> [<c0277428>] sysfs_add_file+0x18/0x20
> [<c02774e1>] sysfs_create_file+0x21/0x30
> [<c036ddc8>] device_create_file+0x18/0x20
> [<c0341f5f>] create_regulator+0xdf/0x320
> [<c0342384>] _regulator_get+0x1e4/0x2a0
> [<e26803d0>] ? sdhci_timeout_timer+0xd0/0xd0 [sdhci]
> [<c034246f>] regulator_get+0xf/0x20
> [<e267e64a>] sdhci_add_host+0x5ea/0xa80 [sdhci]
> [<e268ce47>] sdhci_pci_probe+0x31a/0x3d3 [sdhci_pci]
> [<c02e782d>] pci_device_probe+0x8d/0x120
> [<c0278a27>] ? sysfs_create_link+0x17/0x20
> [<c0370da8>] driver_probe_device+0x68/0x170
> [<c0370f41>] __driver_attach+0x91/0xa0
> [<c0370eb0>] ? driver_probe_device+0x170/0x170
> [<c0370009>] bus_for_each_dev+0x49/0x70
> [<c0370ac1>] driver_attach+0x21/0x30
> [<c0370eb0>] ? driver_probe_device+0x170/0x170
> [<c037079f>] bus_add_driver+0x17f/0x260
> [<c02e7690>] ? pci_dev_put+0x20/0x20
> [<c03713f6>] driver_register+0x66/0x110
> [<c02e85c3>] __pci_register_driver+0x43/0xc0
> [<e268f017>] sdhci_drv_init+0x17/0x19 [sdhci_pci]
> [<c0101125>] do_one_initcall+0x35/0x170
> [<e268f000>] ? 0xe268efff
> [<c0180ca5>] sys_init_module+0x905/0x1ac0
> [<c046325f>] sysenter_do_call+0x12/0x28
> ---[ end trace 1b4ccae14fe3a3a3 ]---
> create_regulator: dummy: could not add regulator_dev requested
> microamps sysfs entry
> mmc1: no vmmc regulator found
> Registered led device: mmc1::
> mmc1: SDHCI controller on PCI [0000:06:09.4] using PIO
> _regulator_get: 0000:06:09.4 supply vmmc not found, using dummy regulator
> --
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