1. 03 Dec, 2013 1 commit
  2. 02 Dec, 2013 1 commit
    • Shawn Guo's avatar
      ASoC: core: fix devres parameter in devm_snd_soc_register_card() · ebff6547
      Shawn Guo authored
      Since devm_card_release() expects parameter 'res' to be a pointer to
      struct snd_soc_card, devm_snd_soc_register_card() should really pass
      such a pointer rather than the one to struct device.
      
      This bug causes the kernel Oops below with imx-sgtl500 driver when we
      remove the module.  It happens because with 'card' pointing to the wrong
      structure, card->num_rtd becomes 0 in function soc_remove_dai_links().
      Consequently, soc_remove_link_components() and in turn
      soc_cleanup_codec[platform]_debugfs() will not be called on card
      removal.  It results in that debugfs_card_root is being removed while
      its child entries debugfs_codec_root and debugfs_platform_root are still
      there, and thus the kernel Oops.
      
      Fix the bug by correcting the parameter 'res' to be the pointer to
      struct snd_soc_card.
      
      $ lsmod
      Module                  Size  Used by
      snd_soc_imx_sgtl5000     3506  0
      snd_soc_sgtl5000       13677  2
      snd_soc_imx_audmux      5324  1 snd_soc_imx_sgtl5000
      snd_soc_fsl_ssi         8139  2
      imx_pcm_dma             1380  1 snd_soc_fsl_ssi
      $ rmmod snd_soc_imx_sgtl5000
      Unable to handle kernel paging request at virtual address e594025c
      pgd = be134000
      [e594025c] *pgd=00000000
      Internal error: Oops: 5 [#1] SMP ARM
      Modules linked in: snd_soc_imx_sgtl5000(-) snd_soc_sgtl5000 snd_soc_imx_audmux snd_soc_fsl_ssi imx_pcm_dma
      CPU: 0 PID: 1793 Comm: rmmod Not tainted 3.13.0-rc1 #1570
      task: bee28900 ti: bfbec000 task.ti: bfbec000
      PC is at debugfs_remove_recursive+0x28/0x154
      LR is at snd_soc_unregister_card+0xa0/0xcc
      pc : [<80252b38>]    lr : [<80496ac4>]    psr: a0000013
      sp : bfbede00  ip : bfbede28  fp : bfbede24
      r10: 803281d4  r9 : bfbec000  r8 : 803271ac
      r7 : bef54440  r6 : 00000004  r5 : bf9a4010  r4 : bf9a4010
      r3 : e5940224  r2 : 00000000  r1 : bef54450  r0 : 803271ac
      Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
      Control: 10c53c7d  Table: 4e13404a  DAC: 00000015
      Process rmmod (pid: 1793, stack limit = 0xbfbec240)
      Stack: (0xbfbede00 to 0xbfbee000)
      de00: 00000000 bf9a4010 bf9a4010 00000004 bef54440 bec89000 bfbede44 bfbede28
      de20: 80496ac4 80252b1c 804a4b60 bfbede60 bf9a4010 00000004 bfbede54 bfbede48
      de40: 804a4b74 80496a30 bfbede94 bfbede58 80328728 804a4b6c bfbede94 a0000013
      de60: bf1b5800 bef54440 00000002 bf9a4010 7f0169f8 bf9a4044 00000081 8000e9c4
      de80: bfbec000 00000000 bfbedeac bfbede98 80328cb0 80328618 7f016000 bf9a4010
      dea0: bfbedec4 bfbedeb0 8032561c 80328c84 bf9a4010 7f0169f8 bfbedee4 bfbedec8
      dec0: 80325e84 803255a8 bee28900 7f0169f8 00000000 78208d30 bfbedefc bfbedee8
      dee0: 80325410 80325dd4 beca8100 7f0169f8 bfbedf14 bfbedf00 803264f8 803253c8
      df00: 7f01635c 7f016a3c bfbedf24 bfbedf18 80327098 803264d4 bfbedf34 bfbedf28
      df20: 7f016370 80327090 bfbedfa4 bfbedf38 80085ef0 7f016368 bfbedf54 5f646e73
      df40: 5f636f73 5f786d69 6c746773 30303035 00000000 78208008 bfbedf84 bfbedf68
      df60: 800613b0 80061194 fffffffe 78208d00 7efc2f07 00000081 7f016a3c 00000800
      df80: bfbedf84 00000000 00000000 fffffffe 78208d00 7efc2f07 00000000 bfbedfa8
      dfa0: 8000e800 80085dcc fffffffe 78208d00 78208d30 00000800 a8c82400 a8c82400
      dfc0: fffffffe 78208d00 7efc2f07 00000081 00000002 00000000 78208008 00000800
      dfe0: 7efc2e1c 7efc2ba8 76f5ca47 76edec7c 80000010 78208d30 00000000 00000000
      Backtrace:
      [<80252b10>] (debugfs_remove_recursive+0x0/0x154) from [<80496ac4>] (snd_soc_unregister_card+0xa0/0xcc)
       r8:bec89000 r7:bef54440 r6:00000004 r5:bf9a4010 r4:bf9a4010
      r3:00000000
      [<80496a24>] (snd_soc_unregister_card+0x0/0xcc) from [<804a4b74>] (devm_card_release+0x14/0x18)
       r6:00000004 r5:bf9a4010 r4:bfbede60 r3:804a4b60
      [<804a4b60>] (devm_card_release+0x0/0x18) from [<80328728>] (release_nodes+0x11c/0x1dc)
      [<8032860c>] (release_nodes+0x0/0x1dc) from [<80328cb0>] (devres_release_all+0x38/0x54)
      [<80328c78>] (devres_release_all+0x0/0x54) from [<8032561c>] (__device_release_driver+0x80/0xd4)
       r4:bf9a4010 r3:7f016000
      [<8032559c>] (__device_release_driver+0x0/0xd4) from [<80325e84>] (driver_detach+0xbc/0xc0)
       r5:7f0169f8 r4:bf9a4010
      [<80325dc8>] (driver_detach+0x0/0xc0) from [<80325410>] (bus_remove_driver+0x54/0x98)
       r6:78208d30 r5:00000000 r4:7f0169f8 r3:bee28900
      [<803253bc>] (bus_remove_driver+0x0/0x98) from [<803264f8>] (driver_unregister+0x30/0x50)
       r4:7f0169f8 r3:beca8100
      [<803264c8>] (driver_unregister+0x0/0x50) from [<80327098>] (platform_driver_unregister+0x14/0x18)
       r4:7f016a3c r3:7f01635c
      [<80327084>] (platform_driver_unregister+0x0/0x18) from [<7f016370>] (imx_sgtl5000_driver_exit+0x14/0x1c [snd_soc_imx_sgtl5000])
      [<7f01635c>] (imx_sgtl5000_driver_exit+0x0/0x1c [snd_soc_imx_sgtl5000]) from [<80085ef0>] (SyS_delete_module+0x130/0x18c)
      [<80085dc0>] (SyS_delete_module+0x0/0x18c) from [<8000e800>] (ret_fast_syscall+0x0/0x48)
       r6:7efc2f07 r5:78208d00 r4:fffffffe
      Code: 889da9f8 e5983020 e3530000 089da9f8 (e5933038)
      ---[ end trace 825e7e125251a225 ]---
      Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
      Signed-off-by: default avatarMark Brown <broonie@linaro.org>
      ebff6547
  3. 29 Nov, 2013 14 commits
  4. 28 Nov, 2013 24 commits