On module removal, the sdio version of b43 generates the following warning:
[ 851.560519] ------------[ cut here ]------------
[ 851.560531] WARNING: at drivers/mmc/core/core.c:237 mmc_wait_for_cmd+0x88/0x90()
[ 851.560534] Hardware name: 20552PG
[ 851.560536] Modules linked in: b43(-) ssb mmc_block binfmt_misc rfcomm sco bnep ppdev l2cap ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm arc4 iwlagn snd_hda_codec_conexant snd_hda_intel snd_hda_codec iwlcore snd_hwdep snd_pcm thinkpad_acpi mac80211 snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq r852 joydev snd_timer sm_common pcmcia nand snd_seq_device cfg80211 sdhci_pci btusb psmouse tpm_tis yenta_socket nand_ids lp snd pcmcia_rsrc nand_ecc bluetooth sdhci tpm pcmcia_core parport mtd snd_page_alloc serio_raw tpm_bios soundcore nvram led_class sha256_generic aes_i586 aes_generic dm_crypt i915 drm_kms_helper drm ahci intel_agp i2c_algo_bit intel_gtt e1000e libahci video agpgart output
[ 851.560620] Pid: 2504, comm: rmmod Not tainted 2.6.36-titan0+ #1
[ 851.560622] Call Trace:
[ 851.560631] [<
c014a102>] warn_slowpath_common+0x72/0xa0
[ 851.560636] [<
c04d94c8>] ? mmc_wait_for_cmd+0x88/0x90
[ 851.560641] [<
c04d94c8>] ? mmc_wait_for_cmd+0x88/0x90
[ 851.560645] [<
c014a152>] warn_slowpath_null+0x22/0x30
[ 851.560649] [<
c04d94c8>] mmc_wait_for_cmd+0x88/0x90
[ 851.560655] [<
c0401585>] ? device_release+0x25/0x80
[ 851.560660] [<
c04df210>] mmc_io_rw_direct_host+0xa0/0x150
[ 851.560665] [<
c04df370>] mmc_io_rw_direct+0x30/0x40
[ 851.560669] [<
c04e06e7>] sdio_disable_func+0x37/0xa0
[ 851.560683] [<
f8dfcb80>] b43_sdio_remove+0x30/0x50 [b43]
[ 851.560687] [<
c04df8cc>] sdio_bus_remove+0x1c/0x60
[ 851.560692] [<
c016d39f>] ? blocking_notifier_call_chain+0x1f/0x30
[ 851.560697] [<
c0404991>] __device_release_driver+0x51/0xb0
[ 851.560701] [<
c0404a7f>] driver_detach+0x8f/0xa0
[ 851.560705] [<
c0403c83>] bus_remove_driver+0x63/0xa0
[ 851.560709] [<
c0405039>] driver_unregister+0x49/0x80
[ 851.560713] [<
c0405039>] ? driver_unregister+0x49/0x80
[ 851.560718] [<
c04dfad7>] sdio_unregister_driver+0x17/0x20
[ 851.560727] [<
f8dfcb42>] b43_sdio_exit+0x12/0x20 [b43]
[ 851.560734] [<
f8dfe76f>] b43_exit+0x17/0x3c [b43]
[ 851.560740] [<
c017fb8d>] sys_delete_module+0x13d/0x200
[ 851.560747] [<
c01fd7d2>] ? do_munmap+0x212/0x300
[ 851.560752] [<
c010311f>] sysenter_do_call+0x12/0x28
[ 851.560757] ---[ end trace
31e14488072d2f7d ]---
[ 851.560759] ------------[ cut here ]------------
The warning is caused by b43 not claiming the device before calling
sdio_disable_func().
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reported-by: Arnd Hannemann <arnd@arndnet.de>
Tested-by: Arnd Hannemann <arnd@arndnet.de>
Cc: Stable <stable@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>